Abstract: When using fixed gain linear feedback control, relying only on the local linearization model of the system to adjust the pitch angle ignores the strong nonlinearity, time-varying parameters, and multi disturbance coupling characteristics of the pitch system, resulting in low synchronization control accuracy under complex operating conditions. A synchronous control method for wind turbine independent pitch control system based on dynamic second-order sliding mode is proposed to address the above issues. Based on mechanical torque reconstruction as the core, combined with the torque characteristics of the pitch motor, blade inertia load, and dynamic characteristics of the pitch angle actuator, a dynamic model of the independent pitch system for wind turbines is constructed. In response to the nonlinear and uncertain characteristics of the system, the state equation is obtained through in-depth analysis of the dynamic model, and the second-order sliding mode surface and sliding mode output are defined. A dynamic second-order sliding mode controller that is insensitive to parameter changes and external disturbances is designed. Based on the characteristics of a dynamic second-order sliding mode controller, uncertainty factors are represented as vectors, and the advantage of designing control laws with only system state errors is utilized to develop a control strategy that adjusts control inputs in real time and ensures synchronous changes in pitch angle. The experiment shows that this method stably controls the peak blade offset within 0.5 ×10^-5 mm, and the pitch angle tracking accuracy is significantly better than the comparative method.