Sewage pump filtering system with self-cleaning function

The invention discloses a sewage pump filtering system with a self-cleaning function, and relates to the technical field of sewage pump cleaning and filtering. The system comprises a water inlet pipe, a sewage pump and a filter, the filter is connected with one end of the water inlet pipe through a flange, the other end of the water inlet pipe is communicated with an inlet of the sewage pump, an outlet of the sewage pump is connected with a water outlet pipe, and the water inlet pipe is communicated with the water outlet pipe through a branch pipeline; an outlet control valve and a check valve are sequentially installed on the water outlet pipe in the water flow direction, a first branch pipe is connected to the water outlet pipe outside an outlet of the check valve, and the lower end of the first branch pipe is communicated with the water inlet pipe; the middle of the first branch pipe is connected with a second branch pipe, and the other end of the second branch pipe communicates with the water outlet pipe