A new control strategy for permanent magnet synchronous motor (PMSM) parameter disturbance and load disturbance was designed. The PMSM control was usually designed by PI control, but the control effect was not good. A new integral sliding mode control (SMC) strategy for the speed controller design was proposed. The integral SMC had strong antiinterference ability, which could not only suppress the highfrequency differential disturbance of the control system, but also reduce the system steadystate error and make the control more accurate. The sliding mode controller was optimized by designing the reaching law function in which the switching parameters of the SMC could be adjusted adaptively, and the system response speed was improved. Taking into account the influence of system parameters and load disturbance on control performance, the active disturbance rejection control was introduced into the SMC, which improved the immunity of the system. Finally, simulation experiments verified that the control performance of the control system was excellent.