Electric pump is the pump driven by electricity. The impeller is fixed on the shaft in two ways. The electric pump has the advantages of simple structure, stable performance, high speed, small volume, light weight, high efficiency, large flow, easy operation and maintenance. Electric pump is composed of pump body, lifting pipe, pump base, submersible motor (including cable) and starting protection device. Pump body is the working part of submersible pump, which is composed of inlet pipe, guide shell, check valve, pump shaft and impeller.