Medicine feeder is indispensable equipment in the process of preparation, storage and feeing of medicine. It is widely used to prepare and feed germicide, flocculation for tap water, average, oxidant, and reducer for polluted water in chemical industry, softener in boiler industry, coagulant for all kinds of polluted water, bleacher lower plasma and liquid medicine of mud disposal and etc to dispose different kinds of raw water. It can be used to prepare and feed biochemical disposal organic nutrition liquid.