Abstract: To tackle the model nonlinear problem caused by huge force change of the ballistic correction fuse in the correction process, and to ensure that the effective control range of the roll angle control algorithm can effectively cover the entire correction control process, a position-velocity double closed-loop PID switching control algorithm based on dynamic pressure change was proposed. Based on the traditional PID control algorithm, switching control was introduced and PID control system was designed as a subsystem. Depending on the correlation between fuze dynamic model and dynamic pressure, switching rules were formulated with dynamic pressure as switching signal to connect several PID control systems in series, which expanded the effective control range of roll angle control system. In order to increase the stability of switching control, a gain scheduling control method was added. Combined with theoretical analysis and simulation verification, the results show that the positioning accuracy in the whole trajectory correction control process is less than 0.25°, and the response time is less than 0.3 s, which verifies the feasibility of PID switching control algorithm based on dynamic pressure change for the nonlinear fuze roll angle control model.