RO water tank cleaning system for drinking water treatment

The utility model discloses an RO water tank cleaning system for drinking water treatment. The water purifier comprises an RO water tank and a CIP circulating cleaning device, the CIP circulating cleaning device comprises a clear water circulating mechanism, a medicament circulating mechanism and a raw water cleaning mechanism, and the RO water tank comprises a main body, a medicament cleaning pipeline and a raw water cleaning pipeline which surround the interior of the main body, and a two-position three-way electromagnetic valve located at the bottom end of the main body. The on-site CIP circulating mechanism is simple in structure and only comprises a clear water circulating mechanism, a medicament circulating mechanism and a raw water cleaning mechanism; the medicament cleaning pipeline and the raw water cleaning pipeline are laid around the inner wall of the RO water tank; the inner wall of the RO water tank is fully disinfected, sterilized and fully cleaned; and finally, after the medicament detection d