the present invention provides a small ozone gas - water mixing pump . the rotation of the leaves drives water to produce intense turbulence vortex , and the bubbles in the water are torn up producing more and smaller bubbles , so that the gas - water contacting area is enlarged , and the ozone is efficiently dissolved into water . the magnetic force between the permanent magnet a on impeller and the permanent magnet b on motor enables the motor driving the impeller without using shaft , so as to avoid sealing problems of the pump driving shaft . the present invention is simple in structure , low cost , safe , stable , and has high ozone dissolving efficiency , so that it is especially applicable to the household appliances , such as dish washers and washing machines , etc .