Compared with the traditional motor oil pump, it has a novel structure, beautiful shape and saves the coupling, pump support and common base plate. The axial length is shortened by about a quarter. Because of the direct connection between the pump and the motor, the operation is more stable, the noise is lower, the vibration is small, the starting torque is large, the installation is simple, the structure is compact, the occupied space is small, and the oil pump can be replaced separately, which improves the working efficiency.