Interference fit is mostly used between the stator and housing of vehicle driving motor, and the appropriate interference amount needs to meet various requirements. Through theoretical calculation and finite element method (FEM), considering the high and low temperature conditions in practical application, the connection strength and transmission torque under the design interference are checked. Then, through the simulation analysis, the deformation of housing rabbet is obtained. In combination with the measured data, the reliability of the FEM is further verified. The finite element checking method for interference can guide the design of the interference fit of stator assembly and the tolerance of housing rabbet of driving motors.