Self-cleaning sewage pump

A self-cleaning sewage pump comprises a first water inlet pipe, a first bevel gear, a worm gear and a second water inlet pipe, two flow guide blocks are symmetrically and fixedly connected to the inner wall of the first water inlet pipe, and two first supporting plates and two second supporting plates are symmetrically and fixedly connected to the interiors of the first water inlet pipe and the second water inlet pipe correspondingly; the sewage treatment device has the beneficial effects that the purpose of smashing waste materials in sewage twice is achieved, the phenomenon that the waste materials in the sewage are not completely smashed is not prone to occurring, meanwhile, in the secondary treatment operation, the waste materials in the sewage are not prone to being smashed completely, and the waste materials in the sewage are not prone to being smashed completely. The linkage effect can be achieved only through driving of one motor, and therefore the situation that multiple motors need to be used, and t