The invention relates to the automatic detection control field, particularly to a sewage pumping station feedback control system. The whole system comprises a sewage detection control part used for controlling operation of a pump group at different working modes, a pump-pump rotary speed control part used for regulating and controlling pump rotary speeds of the pump group at each working mode, a sewage poll water position feedback control part used for controlling operation of a sewage pumping group parallel backup pump, and a pump gas etching protective feedback control part used for controlling to reduce influence of a gas etching cavitation phenomenon on the operation of the pump. Specific to the problems of the sewage pumping station existing on the aspects of automatic regulation, standard, an automatic control system, a fault self-diagnosis technology, and the like, the independent and completely-functional automatic feedback control system is established, so that the monitoring and control automatic functions of the sewage pumping station are improved, and the operating efficiency of the sewage pumping station is improved.