In order to improve the dynamic quality of permanent magnet synchronous motor (PMSM) speed regulation system, an integral sliding mode control algorithm based on a novel hybrid reaching law is proposed. Based on the conventional exponential reaching law, the hyperbolic tangent function, terminal attractor and adaptive factor based on power function of system state variables are introduced. Combined with integral sliding mode surface, the adaptive adjustment ability and anti-disturbance ability of the system approaching speed are improved, and the chattering level is limited. Based on the proposed reaching law, a new hybrid reaching law integral sliding mode speed controller for PMSM is designed. The control performance of the controller is compared with the traditional PI algorithm through simulation. Simulation results show that the new reaching law speed controller has better anti-load disturbance performance, very small chattering and strong robustness.