Submersible sewage pump is a pump used in the environmental protection industry to transport solid and liquid mixed liquids such as domestic sewage, industrial wastewater and mud containing solid particles and fibers. WQ type submersible sewage pump consists of sewage pump, sealing system, submersible motor, control and protection system, automatic installation system and other parts. The difference with the general sewage pump is: WQ submersible sewage pump coaxial pump and motor rotation, and at the same time dive into the liquid work. Pump sealing system can effectively prevent the liquid into the motor chamber to protect the safe operation of the motor. Control and protection system to the pump in the event of water leakage, oil spill, overload, overheating, lack of equal failure, timely alarm and shutdown for repair.