Abstract: Permanent magnet synchronous motor control system requires fast current response and anti-interference capability. The traditional control method mostly adopts vector control, and proportional-integral（PI） regulator was used in its current inner loop. It is difficult to take into account the rapidity and stability of the response when the parameters were not adjusted properly. The external speed PI regulator was prone to fluctuate greatly when subjected to external disturbances. Deadbeat current predictive control had the characteristics of fast response and constant switching frequency. A deadbeat control strategy with two beat delays compensation was proposed to replace the current inner loop PI controller, which brings good current quality to the control. The sliding die had the ability to resist external disturbance. An integral discrete sliding mode speed controller was designed to replace the PI controller of the outer loop of the speed, which brought high stability to the control. In order to reduce the chattering of sliding mode, a sliding mode observer based on load disturbance was designed as feedforward compensation. The experimental results show that the proposed control strategy has excellent dynamic performance and robustness.