This paper introduced the ADAMS/CAR and EASY5 cosimulation technology into active suspension vehicle research. The vehicle with active suspension was built by using ADAMS/CAR, and the active hydraulic system was designed based on EASY5. The cosimulation project was discussed, and the feasibility of this method was proved through the analysis results. The simulation results showed that the ride comfort of the vehicle with active hydraulic suspension was better than the vehicle with passive suspension.