To improve the stability of braking system of electric vehicles, braking system of electric car is analyzed in motor and hydraulic process. Based the requirement of electric car braking torque, a coordination control strategy between motor braking system and hydraulic braking system was proposed. The coordination control strategy mode was established by simulation software platform. By changing braking intensity, braking stability data of the electric vehicles was acquired. The analysis result indicates that the motor braking system can meet the braking requirement during lowintensity braking, while the hydraulic braking system is unable to reach the requirement accordingly.During moderate braking process, to obtain the stability of the braking process, the motor braking system and hydraulic braking system need to work coordinately and effectively. Finally, during high intensity braking process or high battery state of charge(SOC), electrohydraulic braking system can provide stable sole braking force effectively.