In order to solve the problem of vehicle hydraulic driving power transient index control,a pump valve parallel hydraulic motor speed control system based on energy regulation was designed.The application of energy regulation technology in the vehicle hydraulic power generation system was studied,and the main components of the hydraulic system were selected.According to the standard GB/T 2820.5—2009,the hydraulic power generation experiment was carried out,and the test data obtained before and after using energy regulation technology were compared.The results show that the main AC power generation technical indexes of the vehicle hydraulic power generation device using the energy regulation technology can reach G2 national standards;by using the energy regulation technology,the fluctuation range of hydraulic motor speed can be effectively reduced and the vehicle hydraulic power generation transient indexes can be improved.