There are a large number of nonlinearities and uncertainties in electro-hydraulic multi-cylinder synchronous system,which increase the difficulty of precise synchronous control.Therefore， it is of great practical significance to study the synchronous control strategy with high performance.Aiming at the four-cylinder position synchronous system,a kind of adaptive robust control strategy was put forward based on adjacent cross coupling.Based on the adaptive robust controller for single-cylinder position tracking,the synchronous errors between adjacent two cylinders were compensated by the PID coupling controller,so as to achieve the precise synchronization of four-cylinder.Finally,MATLAB/Simulink was used to simulate and analyze the designed four-cylinder synchronous control strategy.The simulation results show that when there is no eccentric load,the maximum steady-state synchronization error of the four-cylinder is 0.05 mm,and the synchronization accuracy can reach 0.06%;in the presence of eccentric load,the maximum steady-state synchronization error of the four-cylinder is -0.1 mm,and the synchronization accuracy is reduced by 0.04%.It can be seen that regardless of whether the system has eccentric load or not,the designed control strategy ensures high synchronization accuracy and its effectiveness is verified.