To improve the dynamic response and disturbance rejection property of the permanent magnet synchronous motor (PMSM) speed regulation system, an improved super-twisting sliding mode linear active disturbance rejection control (STSM-LADRC) strategy was proposed. This strategy optimized the linear extended state observer (LESO) and linear state error feedback (LSEF) control law in LADRC using the sliding mode variable structure principle. First, the STSM-LESO was designed, where the STSM control algorithm improves the LESO in LADRC, enhancing the observing property and thus the controller's disturbance rejection property. Second, the STSM control algorithm replaced the original LSEF control law, improving the controller's dynamic response property. The hyperbolic tangent function was used instead of the sign function in the STSM algorithm to further reduce inherent sliding mode chattering and enhance system stability. The proposed control strategy was then analyzed for stability using Lyapunov theory. Finally, s