Phosphorous-removal reflux tank structure for excess sludge refluxing and utilizing system

The utility model discloses a phosphorous-removal flux tank structure for an excess sludge refluxing and utilizing system. The phosphorous-removal flux tank structure comprises a phosphorous-removal flux tank body, wherein the upper side wall of the tank body is connected with a sedimentation and concentration tank water outlet pipeline for inflowing a carbon-source containing liquid supernatant; a phosphorous-removal agent adding pipeline is connected to the tank body; the phosphorous-removal agent adding pipe is vertically fixed on the middle part of the tank body by a supporting piece; a horizontal shunt pipe is connected at the lower end of the phosphorous-removal agent adding pipeline; a plurality of adding points are formed on the horizontal shunt pipe at intervals; a plurality of outlet pipes which are communicated with the horizontal shunt pipe and uniformly distributed along the circumferential direction are arranged on each adding point; a liquid supernatant outlet channel is further formed on the u