directed to the situation that the androgenetic alopecia cannot be cured now and the fact that a single compound in market cannot effectively and quickly get rid of basic factors which cause the alopecia , the objective of the present invention is , following the concept of the combined medication , to provide a mixed solution for external use which have potentiality to effectively and quickly cure the alopecia , and the preparation thereof and methods for use the same . the present invention uses the following technical solution to solve the technical problem : a hair - growth - promoting solution containing chlorine dioxide , made from the following components in weight percentage : chlorine dioxide or chlorine dioxide precursor 0 . 1 - 7 . 5 , dimethyl sulfoxide 0 - 30 , lycium barbarum polysaccharides 0 - 20 , flax lignan0 - 20 , sodium chloride 0 - 1 . 5 , a conditioner 0 - 20 , a proper amount of a ph regulator to regulate the ph value to 1 . 5 - 4 . 5 , supplemented with deionized water to 100 . in the aforementioned solution , the chlorine dioxide precursor may be sodium chlorite , potassium chlorite , calcium chlorite , magnesium chlorite or barium chlorite , and preferably sodium chlorite . in the aforementioned solution , the ph regulator may be one or more of citric acid , acetic acid , glycolic acid , salicylic acid , boric acid , sodium dihydrogen phosphate or lactic acid , and preferably citric acid . in the aforementioned solution , the conditioner is one or more of sodium citrate , aloe extract , or vitamin b . a method for preparing the aforementioned hair - growth - promoting solution containing chlorine dioxide , comprises the following step : deionized water is taken in a proportional amount , and lycium barbarum polysaccharides , flax lignan , a conditioner and sodium chloride are added thereto ; the resultant mixture is heated to 60 - 75 ° c ., with stirring to make them be completely dissolved ; then the mixture is cooled to 30 ° c . or less , and then chlorine dioxide gas or chlorine dioxide precursor is introduced ; after stirring , the ph of the mixed solution is adjusted with a ph regulator to be 1 . 5 to 4 . 5 . a method for using the aforementioned hair - growth - promoting solution containing chlorine dioxide , comprises the following steps : the hair - growth - promoting solution containing chlorine dioxide is taken out from a sealed container and placed in a glass or plastic cup ; subsequently , the solution is dipped with a cotton swab and then is smeared on the alopecia area , and after waiting for 1 to 2 hours , the head is washed with water . a hair - growth - promoting solution containing a chlorine dioxide precursor comprises the following the following individual solutions which are preserved separately , in which the solutions which are preserved separately have the following components and concentrations thereof in weight percentage : ( 1 ) a solution comprising 1 %- 45 % of a chloride dioxide precursor and 0 - 11 % of sodium chloride ; ( 2 ) a solution comprising 0 . 45 %- 20 % of a ph regulator and 0 - 60 % of dimethyl sulfoxide ; ( 3 ) a solution comprising 0 . 45 %- 20 % of a ph regulator and 0 - 40 % of lycium barbarism polysaccharide ; ( 4 ) a solution comprising 0 . 45 %- 20 % of a ph regulator and 0 - 40 % of flax lignan ; ( 5 ) a solution comprising 0 . 45 %- 20 % of a ph regulator and 0 - 40 % of a conditioner ; wherein prior to each use , the solutions which are preserved separately are taken in a certain same volume and mixed , and the amount of the ph regulator is selected in a manner that the ph value of the resultant mixed solution prior to the use is adjusted to be 1 . 5 to 4 . 5 . in the aforementioned solution , in addition that the solution containing a chlorine dioxide precursor should be preserved separately , other solutions comprising a ph regulator can be preserved in combination . in the aforementioned solution , the chlorine dioxide precursor may be sodium chlorite , potassium chlorite , calcium chlorite , magnesium chlorite or barium chlorite , and preferably sodium chlorite . in the aforementioned solution , the ph regulator may be one or more of citric acid , acetic acid , glycolic acid , salicylic acid , boric acid , sodium dihydrogen phosphate or lactic acid , and preferably citric acid . in the aforementioned solution , the conditioner is one or more of sodium citrate , aloe extract , or vitamin b . a method for preparing the aforementioned hair - growth - promoting solution containing a chloride dioxide precursor comprises the following steps : ( 1 ) adding a chlorine dioxide precursor and sodium chloride in proper amount to deionized water ; heating the resultant mixture to 60 - 75 ° c . with stirring to make them to be completely dissolved ; then cooling the mixture to 30 ° c . or less , to give the first mixed solution ; ( 2 ) adding a ph regulator and dimethyl sulfoxide in proper amount to deionized water with stirring to make them to be completely dissolved , to give the second mixed solution ; ( 3 ) adding a ph regulator and lycium barbarum in proper amount to deionized water ; heating the resultant mixture to 70 - 85 ° c . with stirring to make them to be completely dissolved ; then cooling the mixture to 30 ° c . or less , to give the third mixed solution ; ( 4 ) adding a ph regulator and flax lignan in proper amount to deionized water ; heating the resultant mixture to 70 - 85 ° c . with stirring to make them to be completely dissolved ; then cooling the mixture to 30 ° c . or less , to give the fourth mixed solution ; ( 5 ) adding a ph regulator and a conditioner in proper amount to deionized water ; heating the resultant mixture to 60 - 75 ° c . with stirring to make them to be completely dissolved ; then cooling the mixture to 30 ° c . or less , to give the fifth mixed solution ; ( 6 ) adding a ph regulator in proper amount to deionized water with stirring to make it to be completely dissolved , to give the sixth mixed solution . a method for using the aforementioned hair - growth - promoting solution containing a chlorine dioxide precursor comprises the following steps : from individual container separately containing above mentioned individual solution , solutions in the same volume are taken respectively and placed in a glass or plastic cup with a suitable size prepared in advance ; the solutions are mixed and then stand for 3 to 5 min , the obtained mixed solution is dipped with a cotton swab and then is smeared on the alopecia area , and after waiting for 1 to 2 hours , the head is washed with water the method according to the present invention has the following advantageous and beneficial effects : ( 1 ) the present invention introduces the safety and effective oxidation sterilization and tissue regeneration ability of chlorine dioxide into the hair - growth - promoting solution system , to remove hair loss factors , stimulate the growth of hair follicles , and synchronously accomplish anti - inflammatory and anti - dandruff effects . ( 2 ) in the present invention , the mixed solution is administrated in the alopecia area , to rapidly and sufficiently exert the effect of the hair - growth - promoting solution and reduce possible side effects . ( 3 ) in the present invention , a plant extract is employed to supplement the hair - growth - promoting effect of chloride dioxide , to completely change the environment causing the alopecia , and at the same time , the following effects can be achieved : inhibiting 5α - reductase , eliminating dht , increasing the drug permeability , anti - inflammatory and dandruff , increasing nutrient supply to hair follicles , and stimulating the regeneration of hair follicles , to make the cure of androgenetic alopecia possible . ( 4 ) the invention uses the method of combined administration to increase the permeability of drugs to the scalp , and improve the stimulation of the mixed solution to the scalp . ( 5 ) the present invention radically changes the environment for the growth of hairs , and rapidly and effectively gets rid of factors causing the alopecia ; thus , even if the mixed solution is not used for a long time , healthy hairs can grow . the invention has the aforementioned significant effects due to the following reasons : a suitable concentration of chloride dioxide is utilized , further supplemented with substances having the permeability ; then the product is administrated on scalp , to go deep into hair follicle ; thus , the product can achieve the effects of inhibiting 5α - reductase , reducing dht influences , allaying the swelling of sebaceous gland , and getting rid of main factors causing the alopecia ; meantime , the antibacterial ability of chloride dioxide is utilized to remove scurf and improve scalp surface of hair follicles ; further , the mixed solution stimulates hair follicles , to promote the organization regeneration , so that new hairs can be developed ; by adding the lycium barbarum polysaccharide ( which can restore the activity of scalp cells , reduce serum cholesterol and triglyceride contents , and ultimately increase blood nutrient supply ) and flax lignan ( plant estrogens , which can inhibit dht , prevent skin aging , increase skin thickness , and improve skin moisture ), the hair - growth - promoting ability of chlorine dioxide can be supplemented under the action of medical solvents and conditioners , to reduce the stimulation and completely improve the environment causing the alopecia . the final mixed solution can achieve the ideal effect of rapidly developing hairs , so that the alopecia sufferers can be cured without a long time administration . by the following specific embodiments , the product and method according to the invention is described in a further and detailed manner . the hair - growth - promoting solution for external use containing chlorine dioxide according to the invention can be classified into two forms : a single solution containing chlorine dioxide and a combination of several solutions containing chlorine dioxide precursors . hence , the product according to the invention can be classified into two forms : a single solution containing chlorine dioxide and a combination of several solutions containing chlorine dioxide precursors . a hair - growth - promoting solution containing chlorine dioxide is made from the following components in weight percentage : chlorine dioxide or a chlorine dioxide precursor 0 . 1 - 7 . 5 , dimethyl sulfoxide 0 - 30 , lycium barbarum polysaccharide 0 - 20 , flax lignan0 - 20 , sodium chloride 0 - 1 . 5 , a conditioner 0 - 20 , a proper amount of a ph regulator to regulate the ph value to 1 . 5 - 4 . 5 , supplemented with deionized water to 100 . further , the solution is made from the following components in weight percentage : chlorine dioxide or a chlorine dioxide precursor 0 . 15 - 5 , dimethyl sulfoxide 0 - 30 , lycium barbarum polysaccharides 0 - 20 , flax lignan0 - 20 , sodium chloride 0 . 2 - 1 , a conditioner 0 . 5 - 15 , a proper amount of a ph regulator to regulate the ph value to 1 . 5 - 4 . 5 , supplemented with deionized water to 100 . more further , the solution is made from the following components in weight percentage : chlorine dioxide or a chlorine dioxide precursor 0 . 2 - 4 , dimethyl sulfoxide 0 - 30 , lycium barbarum polysaccharides 0 - 20 , flax lignan0 - 20 , sodium chloride 0 . 2 - 0 . 85 , a conditioner 0 - 10 , a proper amount of a ph regulator to regulate the ph value to 1 . 5 - 4 . 5 , supplemented with deionized water to 100 . even further , the solution is made from the following components in weight percentage : chlorine dioxide or a chlorine dioxide precursor ( preferably sodium chlorite ) 0 . 2 - 4 , dimethyl sulfoxide 0 - 30 , lycium barbarum polysaccharides 0 - 20 , flax lignan0 - 20 , sodium chloride 0 . 2 - 0 . 85 , a conditioner 1 - 10 , a proper amount of a ph regulator ( preferably citric acid ) to regulate the ph value to 1 . 5 - 4 . 5 , supplemented with deionized water to 100 . the method for preparing the aforementioned single solution containing chlorine dioxide is as follow : deionized water is taken in a specific proportional amount , and lycium barbarum polysaccharide , flax lignan , conditioners and sodium chloride are added thereto ; the resultant mixture is heated to 60 - 75 ° c . with stirring to make them to be completely dissolved ; after cooling the mixture to 30 ° c . or less , chlorine dioxide gas or chlorine dioxide precursors are introduced thereto ; after stirring , the ph value of the mixed solution is regulated with a ph regulator to be 1 . 5 to 4 . 5 , to give the product . a method for using the aforementioned hair - growth - promoting single solution containing chlorine dioxide comprises the following steps : from a sealed container , the product is taken in a suitable amount ( depending on personal situation and the size of alopecia area ) and placed in a glass or plastic cup with a suitable size ( the container is sealed immediately to prevent the volatilization of chlorine dioxide ); the product is dipped with a cotton swab and then is smeared on the alopecia area , and after waiting for 1 to 2 hours , the head is washed with water . since chlorine dioxide cannot be stably held in an aqueous solution for a long time , the mixed solution according to the invention can be divided into several parts to be preserved separately . prior to each use ( prior to smearing the solution on the alopecia area ), the parts are mixed and then used , which either can avoid reactions between different substances , or can avoid the excessive volatilization of chlorine dioxide . upon using the solutions by mixing , individual solutions which are preserved separately are taken in a certain same volume ( for example , the drop number ) and then mixed . several solutions which are preserved separately have the following components and concentrations thereof in weight percentage : ( 1 ) a solution comprising 1 %- 45 % of a chloride dioxide precursor and 0 - 11 % of sodium chloride ; ( 2 ) a solution comprising 0 . 45 %- 20 % of a ph regulator and 0 - 60 % of dimethyl sulfoxide ; ( 3 ) a solution comprising 0 . 45 %- 20 % of a ph regulator and 0 - 40 % of lycium barbarum polysaccharide ; ( 4 ) a solution comprising 0 . 45 %- 20 % of a ph regulator and 0 - 40 % of flax lignan ; ( 5 ) a solution comprising 0 . 45 %- 20 % of a ph regulator and 0 - 40 % of a conditioner ; the amount of the ph regulator is selected in a manner that the ph value of the mixed solution ( prior to each use , several solutions which are preserved separately are taken and mixed in a certain same volume ) prior to the use is adjusted to be from 1 . 5 to 4 . 5 . preferably , the several aforementioned solutions are used according to the rule that each solution which is preserved separately is taken in the same volume ( such as the drop number ), and individual solutions which are preserved separately have the following components and concentrations thereof in weight percentage : ( 1 ) a solution comprising 10 %- 30 % of a chloride dioxide precursor ( preferably sodium chlorite ) and 2 . 5 - 7 . 5 % of sodium chloride ; ( 2 ) a solution comprising 4 . 5 %- 13 . 5 % of a ph regulator ( preferably citric acid ) and 0 - 60 % of dimethyl sulfoxide ; ( 3 ) a solution comprising 4 . 5 %- 13 . 5 % of a ph regulator ( preferably citric acid ) and 0 - 40 % of lycium barbarum polysaccharide ; ( 4 ) a solution comprising 4 . 5 %- 13 . 5 % of a ph regulator ( preferably citric acid ) and 0 - 40 % of flax lignan ; ( 5 ) a solution comprising 4 . 5 %- 13 . 5 % of a ph regulator ( preferably citric acid ) and 0 - 40 % of a conditioner ; ( 6 ) a solution comprising 4 . 5 %- 13 . 5 % of a ph regulator ( preferably citric acid ). the amount of the ph regulator ( preferably citric acid ) is selected in a manner that the ph value of the mixed solution ( prior to each use , several solutions which are preserved separately are taken and mixed in the same volume ) prior to the use is regulated to be from 1 . 5 to 4 . 5 . more preferably , the aforementioned different solutions are used according to the rule that each solution which is preserved separately is taken in the same volume ( such as the drop number ), and individual solutions which are preserved separately have the following components and concentrations thereof in weight percentage : ( 1 ) a solution comprising 15 %- 25 % of a chloride dioxide precursor ( preferably sodium chlorite ) and 3 . 5 - 6 % of sodium chloride ; ( 2 ) a solution comprising 6 . 75 %- 11 . 25 % of a ph regulator ( preferably citric acid ) and 0 - 60 % of dimethyl sulfoxide ; ( 3 ) a solution comprising 6 . 75 %- 11 . 25 % of a ph regulator ( preferably citric acid ) and 0 - 40 % of lycium barbarum polysaccharide ; ( 4 ) a solution comprising 6 . 75 %- 11 . 25 % of a ph regulator ( preferably citric acid ) and 0 - 40 % and 0 - 40 % of flax lignan ; ( 5 ) a solution comprising 6 . 75 %- 11 . 25 % of a ph regulator ( preferably citric acid ) and 0 - 40 % and 0 - 40 % of a conditioner ; ( 6 ) a solution comprising 6 . 75 %- 11 . 25 % of a ph regulator ( preferably citric acid ) and 0 - 40 %. the amount of the ph regulator ( preferably citric acid ) is selected in a manner that the ph value of the mixed solution ( prior to each use , several solutions which are preserved separately are taken and mixed in the same volume ) prior to the use is adjusted to be from 1 . 5 to 4 . 5 . the method for preparing the combination of several solutions containing a chloride dioxide precursor comprises the following steps : ( 1 ) adding a chlorine dioxide precursor and sodium chloride in proper amount to deionized water ; heating the resultant mixture to 60 - 75 ° c . with stirring to make them to be completely dissolved ; then cooling the mixture to 30 ° c . or less , to give the first mixed solution ; ( 2 ) adding a ph regulator and dimethyl sulfoxide in proper amount to deionized water with stirring to make them to be completely dissolved , to give the second mixed solution ; ( 3 ) adding a ph regulator and lycium barbarum in proper amount to deionized water ; heating the resultant mixture to 70 - 85 ° c . with stirring to make them to be completely dissolved ; then cooling the mixture to 30 ° c . or less , to give the third mixed solution ; ( 4 ) adding a ph regulator and flax lignan in proper amount to deionized water ; heating the resultant mixture to 70 - 85 ° c . with stirring to make them to be completely dissolved ; then cooling the mixture to 30 ° c . or less , to give the fourth mixed solution ; ( 5 ) adding a ph regulator and a conditioner in proper amount to deionized water ; heating the resultant mixture to 60 - 75 ° c . with stirring to make them to be completely dissolved ; then cooling the mixture to 30 ° c . or less , to give the fifth mixed solution ; ( 6 ) adding a ph regulator in proper amount to deionized water with stirring to make it to be completely dissolved , to give the sixth mixed solution . the amount of the ph regulator is selected in a manner that the ph value of the mixed solution ( prior to each use , several solutions which are preserved separately are taken and mixed in the same volume ) is adjusted to be from 1 . 5 to 4 . 5 . a method for using the combination of several solutions containing a chlorine dioxide precursor comprises the following steps : from containers containing different solutions , the solutions are taken in the same volume ( such as the same drop number , the total amount depends on personal situation and the size of alopecia area ) and placed ( dropped ) in a glass or plastic cup with a suitable size prepared in advance ; after the solutions are mixed and stand for 3 to 5 minutes , the obtained mixture is dipped with a cotton swab and then is smeared on the alopecia area , and after waiting for 1 to 2 hours , the head is washed with water . there are 43 male alopecia sufferers ( ages : from 22 to 68 ) which use the product of the invention as volunteers , and the corresponding situations are shown in table 1 . while the present invention has been described and illustrated by reference to general descriptions and particular embodiments , on the basis of the invention , it is obvious for those of ordinary skill in the art to make some amendments or improvements . hence , these amendments or improvements made on the basis that the spirits of the present invention are not deviated belong to the scope as claimed in the present invention .