Aimed at the issue of the larger synchronization error caused by the partial load in the hydraulic synchronous system with gear shunt motor as its core,a method by accessing one-way sequence valve which sets same opening pressure is presented to reduce the pressure difference among outlets of gear shunt motor,thus to reduce the synchronization error of the system. The simulation model of double cylinder synchronous system based on AMESim is established. The pressure pulsation,flow rate fluctuation,displacem...