In order to improve the performance of dualclutch automatic transmission, on the basis of analyzing the working principle of the selfdeveloped sevenspeed doubleclutch automatic transmission’〖KG-*2〗s electrohydraulic control system, the interaction between working hydraulic cylinders and its influencing factors were studied with AMESim software. By selecting appropriate hydraulic parameters, the degree of mutual influence was reduced. The simulation results show: in the electrohydraulic control system, the interaction between the two clutch cylinders is the largest, and the piston cylinder crosssectional area (piston stroke unchanged), pump displacement, motor speed, accumulator volume, oil channel hydraulic diameter will affect the degree of mutual influence of the two cylinders.