Submersible sewage pump is a pump product used in the environmental protection industry to transport solid-liquid mixed liquids containing solid particles, fibers, etc., such as domestic sewage, industrial wastewater, mud, etc. WQ type submersible sewage pump is composed of sewage pump, sealing system, submersible motor, control and protection system, automatic installation system and so on. Different from the general sewage pump: in the WQ type submersible sewage pump, the pump and the motor rotate coaxially, and work underwater at the same time. The sealing system of the pump can effectively prevent the liquid from entering the motor cavity and protect the safe operation of the motor. The control and protection system enables the pump to alarm in time and shut down for repairs in the event of water leakage, oil leakage, overload, overheating, and lack of phase failure.