Sterilization purifying agent for drinking water in rural cistern

The invention relates to a sterilant for sterilizing drinking water, in particular to a sterilization purifying agent for drinking water in a rural cistern, which comprises the following raw materials in parts by weight: 10-15 parts of attapulgite, 10-15 parts of potassium monopersulfate and 15-32 parts of foaming agents, wherein the attapulgite is sieved by a sieve with 250-300 meshes after being conventionally acidized and pulverized, and the foaming agent is the composition of citric acid and sodium hydrogen carbonate. The sterilization purifying agent for drinking water also comprises auxiliary materials, such as microcrystalline cellulose and / or magnesium sulfate and the like, and can be prepared into effervescent granules or effervescent tablets. The sterilization purifying agent can solve the problems of cistern water pollutants, seriously superstandard poisonous chemical matters and pathogens, higher heavy metal content and the like and prevent a series of diseases caused by the problems, and has the characteristics of convenience in use, no corrosion, no toxicity, no residual, environmental-protection performance, safety and capability of improving the water quality of cistern water in one step.