In order to realize the integrated-electro-hydraulic brake system (IEHB) pressure control precision, the IEHB whole simulation model which contains hydraulic system and mechanical system was established based on MATLAB/Simulink software. The IEHB system has a number of mutually coupled control objects and these were analyzed, and the control strategies of the electric master cylinder, booster power motor, pressure increasing valve, reduce pressure valve and electric pump were designed, then the master cylinder and wheel cylinder pressure coordinate precision control can be achieved. Finally, the IEHB system and the pressure control strategies were modeled and verified by simulation experiments under three different working conditions. The results show that the real IEHB system was simulated well by the IEHB model, and the IEHB pressure control strategies which were designed have better tracking response performance and stronger robustness compared with the traditional PID control.