Aiming at the problem that the movement of the lifting hydraulic cylinders on both sides of the multifunctional compression refuse truck is out of sync when the lifting hydraulic work based on existing hydraulic system, a synchronous control system was proposed, that was, ordinary speed control valve and electro-hydraulic proportional speed control valve were added to the hydraulic control system to achieve master-slave synchronous control; through the PID module, the flow of the electro-hydraulic proportional speed control valve was controlled, so that the displacement error of the active cylinder and the driven cylinder was reduced, and the high-precision synchronous movement of the master and slave cylinders was achieved. The control scheme was simulated and verified by using AMESim 16 software. The results show that the proposed system has faster response speed, higher synchronization accuracy and higher operation stability.