Anti-clog submersible sewage pump

The invention relates to a submersible sewage pump which comprises a pump body, an impeller and a pump cover, wherein a convex ring of the impeller extends into the pump cover. The submersible sewage pump is characterized in that a floating bushing is further mounted between the convex ring and the pump cover; a pressing block is mounted on the pump cover; an elastic element is arranged in the pressing block and used for propping against the lower end face of the floating bushing; and the upper end face of the floating bushing props against an impeller cover of the impeller. The submersible sewage pump has a simple structure. By using the pump provided by the invention, the problem that the submersible sewage pump is easily clogged by foreign bodies is solved, and the foreign bodies can be cut off and smashed, thus the normal operation of the submersible sewage pump is achieved. The submersible sewage pump can be used for the irrigation and drainage of various polluted water and waster water containing foreign bodies.