Result: The results show that: The proportion of private pharmacy asks buyer about the symptom of diarrhea before sold is 27.18 percent. The proportion of buyer decide the dose of treatment in private pharmacy is 32.04 percentThe proportion of private pharmacy doesn't ask buyer about the information of patient is 15.53 percentThe proportion of private pharmacy uses antibiotic without knew about the reason is 83.50 percentThe proportion of private pharmacy gives the professional advice to the buyer is 79.61 percent Conclusion: In general, diarrhoea treatment sell - practice in private pharmacy took place in many complex and trouble, with many violate the principle in administrative matter and medicine sell - pratice matter.