In view of the big hydraulic pressure fluctuation, high adjustment frequency, great control error of sliding rate in the process of braking of distributed driven electric vehicle (electric wheel motors). The hierarchical control strategy based on the constant hydraulic pressure is proposed. The upper part of this strategy calculates the braking torque of each wheel for the control of wheel slip rate by using pavement recognition technology, the vehicle dynamics model based on Carsim software and the vehicle state parameters. The lower part assigns the torque to hydraulic braking and electrical braking wheel to implement the anti-lock function based on constant hydraulic pressure, the motor braking adjusts the slip rate preferentially to reduce the frequency and amplitude of hydraulic pressure fluctuations, improving the stability of braking, The hierarchical control strategy simulation experiments are implemented respectively on splitter road through Carsim and Matlab/Simulink co-simulation experiment to verify the effectiveness of the proposed strategy. Simulation results show that compared with the traditional logic threshold ABS control strategy, the electro-hydraulic compound ABS hierarchical control strategy is able to keep hydraulic pressure constant and improve the stability and comfort effectively in the braking process.