Centrifugal pump with self-filtering function

The invention discloses a centrifugal pump with a self-filtering function, which belongs to the technical field of centrifugal pumps and comprises a pump shell, a pump shaft rotatably mounted between two ends of the pump shell, a motor fixed at the outer end of the pump shell and used for driving the pump shaft and an impeller fixedly mounted on the pump shaft, and a filter box is arranged at the water inlet end of the pump shell. According to the centrifugal pump, the filter box is installed at the water inlet end of the pump shell, the rotary disc is rotatably installed in the filter box, and the filter screens are evenly distributed in the installation groove in the rotary disc in an annular array mode, so that the centrifugal pump has the filtering function, and then the rotary mechanism at the top of the filter box is used for actively controlling rotation of the rotary disc; the filter screen is washed by using the backwashing mechanism at the bottom of the filter box, and finally impurities are collect