The motor and pump of the shielded electric pump constitute a whole. The stator's inner surface and outer surface of the rotor with magnetic conductivity of corrosion resistant metal thin not company seal welding, make the stator winding and rotor core and conveying liquid completely separated, will not be erosion of conveying fluid. Conveying the medium with less than 150 degree of crystallization, non-solidification and no granule. In addition, the impeller and rotor are mounted on a shaft, supported by two bearings of the motor. The whole rotor is immersed in the conveying fluid, and there is no rotating parts connected with the external part, so it is an absolutely no leakage structure.