When the vehicle passes through an obstacle, it is easy to cause high suspension vibration amplitude, which affects the stability and comfort of the vehicle movement. A simplified model of vehicle hydraulic suspension is established, and nonlinear control equations are deduced according to Newtons law. The hydraulic drive control equation was given by using doublemoving hydraulic system to drive vehicle suspension mechanism.The optimal control process of vehicle hydraulic suspension was given by using the differential evolution algorithm to optimize the internal and outer ring parameters of Proportion Integral Derivative (PID) control. The optimized control parameters and initial motion parameters were imported into the MATLAB software for simulation,and the tire stroke, suspension stroke and body acceleration simulation curve were output. Simulation curves show that the disturbance by sine curve road obstacles, the optimized vehicle hydraulic suspension control system, not only control response time is short, and tire stroke, suspension stroke and smaller peak acceleration as the car body, the overall volatility is smaller. The hydraulic suspension parameters of the vehicle adopt differential evolution algorithm to optimize PID control, which can reduce the vibration amplitude caused by road disturbance and help to maintain the stability of vehicle driving.