Gearmotor flowdividers are widely used in the multicylinder synchronization control. However, due to the differences in working conditions of the cylinders, the synchronization error is occasionally large and difficult to eliminate. A SimHydraulics model of a fourcylinder synchronous lifting system that was controlled by a gearmotor flowdivider was established with MATLAB. Then a simulation study was conducted. Through the control variable method, the main influencing factors of the synchronization effect in the gearmotor flowdivider control mode were determined, and on this basis, a control strategy based on mean deviation for flow compensation with directional valves was proposed. Simulation results show that this control strategy can be used to effectively eliminate synchronization errors caused by differences in working conditions.