A fuzzy sliding mode control method for permanent magnet synchronous motors based on an improved exponential reaching law, and a fuzzy sliding mode motor speed control method based on a variable exponential coefficient reaching law, which is the basis of the conventional exponential reaching law in sliding mode control The system state norm is introduced above, so that the speed of the moving point approaching the sliding mode surface in the sliding motion stage and the chattering amplitude in the sliding mode stage are related to the system state variables, so that the approaching speed is associated with the system state change, and combined with fuzzy control to suppress Chattering generated by sliding mode control, the improved control method effectively improves the response speed and accuracy of the system, weakens system chattering, has strong robustness to uncertain disturbances, and greatly improves the performance of the speed control system. performance, so that the motor has better dynamic and static performance.