In order to weaken the cogging torque and core loss of the electric vehicle hub motor, a method based on the stator slot offset was proposed to analyze the above problems. The formulas for calculating the cogging torque and core loss of the electric automobile hub motor were derived, the parameters of the hub motor were determined and the geometric model of the hub motor was established; the models with different deflection angles were imported into the finite element simulation model,the cogging torque and core loss were simulated respectively and the correctness of the model was verified. The results show that when the offset angle of the entire slot is 3°, the optimal values of the cogging torque and core loss of the hub motor model can be take, and the reduction of cogging torque is about 98%, the reduction of core loss is about 65%, and the reduction of the first harmonic is about 96%. The simulation results verify that the method based on the stator full slot offset has obvious suppression effect on cogging torque, iron core loss and the first harmonic. The proposed method provides reference value for the optimal design of the cogging torque and core loss of the electric vehicle hub motor.