Abstract:The double hoist system of large crane was taken as the research object. Aiming at the problem of dual motor synchronization error existed in the process of hoisting system, a sliding mode control method based on cerebellar model articulation controller(CMAC) was proposed.The fast response of the CMAC and the strong anti-jamming capability of the sliding mode variable structure control were fully used solve the poor robustness of traditional control method. In the control process, cross coupling control mode was used; according to the dynamic characteristics of the hydraulic system,the hydraulic pump outlet pressure difference and hook tilt angle were taken as control targets to make simulation. The lifting condition was studied by experiment.The results show that compared with the traditional method, the proposed control strategy can be used to effectively improve the synchronous control accuracy of two motors, and has strong antiinterference ability.