The working principle of the full hydraulic braking system was introduced.According to the analysis of the composing modules of the braking system,a model of the full hydraulic braking system was established by the software of AMESim,and the charging characteristics of the accumulator charging valve and the dynamic braking performance of the full hydraulic braking system were simulated.The comparison between simulation and test proved that the performance of the full hydraulic braking system meets the braking requirements in the engineering application.