Efficient phosphorus removal system and method for domestic sewage

The invention discloses a domestic sewage efficient dephosphorization system which comprises a control panel, a lower shell and an upper shell, the lower shell and the upper shell are arranged from bottom to top, a discharging box is rotationally arranged in the upper shell, a discharging structure is arranged at the bottom of the discharging box, and a rotation driving assembly used for driving the discharging box to rotate is arranged on the upper shell. A material stirring rod assembly used for stirring and stirring powder in the discharging box is arranged in the discharging box, and a spiral mixing pipeline assembly used for mixing the powder and sewage is arranged on the bottom side of the upper shell. Under the condition that the rotary driving assembly drives the discharging box to rotate, the flowing domestic sewage can annularly flow downwards into the funnel along the inner wall of the lower shell through the annular liquid passing gap formed by the liquid baffle and the lower shell, and the flowin