The invention relates to a sewage drug-feeding and circulating treatment system, which comprises a sewage treatment chamber; a drug chamber is arranged at the upper part of the sewage treatment chamber; a sewage transferring chamber is arranged on the right side of the sewage treatment chamber; a sewage filtering chamber and a clean water chamber are respectively arranged at the upper part and thelower part of the right side of the sewage transferring chamber; a left support side plate and a right support side plate are respectively fixedly installed at the lower parts of the sewage treatmentchamber and the clean water chamber; a connecting transverse plate is installed between the lower parts of the left support side plate and the right support side plate in a connecting manner; a watersuction pump is arranged on the connecting transverse plate; a water intake pipe is installed in an inlet formed in the upper part of the water suction pump; the inlet in the other end of the water intake pipe is arranged in the sewage transferring chamber; and an outlet formed in the left side of the water suction pump is connected with a circulating outlet pipe. In the invention, sewage is conveniently treated and then supplied and used after drug stirring by arranging a drug-feeding system with stirring function, thereby having good effect in sewage treatment; and a stirring mechanism is arranged in the sewage treatment process, thereby enabling the effect of sewage treatment reaction to be better and being high in sewage treatment efficiency.