Sewage treatment agent feeding equipment and method for sewage treatment

The invention discloses sewage treatment agent feeding equipment and method for sewage treatment. The sewage treatment agent feeding equipment comprises a guide frame, liquid supply mechanisms are arranged on the left side and the right side of the guide frame; a feeding mechanism is arranged in the guide frame; wherein a putting processing barrel included in the putting mechanism is fixedly arranged in a guide bracket; wherein elastic liquid supply bags included in the liquid supply mechanism are installed on the left side and the right side of the interior of the guide frame, and abutting supports are arranged on the inner sides of the elastic liquid supply bags on the left side and the right side in an attached mode. According to the sewage treatment agent feeding equipment and method for sewage treatment, a feeding treatment barrel reciprocates in a guide frame, so that a fed treatment agent is subjected to auxiliary discharging through a material dredging rotating rod and a knocking material removing blo