Electrochemical mechanical machining (ECMM) was employed to process the bearing crown raceway to solve the traditional problems. Firstly, a mathematical model about the electrochemical machining with non-uniform time effect of crown raceway was created. The crown shape obtained at different cathode shape was analyzed. The cathode shape was then numerical simulated and acquired according to the anode crown. Finally, the bearing raceway was processed via ECMM with non-uniform time effect using the crown cathode, improving the surface quality and obtaining a surface with certain crown.