针对激光制导炸弹的滚转控制通道的时变特性，设计了一种滑模变结构控制器，利用系统在滑动模态上的一致鲁棒性使弹体在各工作点上都具有良好的特性。该控制器具有线性部分用以控制趋近段的动态特性，用滑动模态来保证系统在终态的特性。仿真结果表明该控制器具有良好的性能。 Aiming at the time-varying characteristics of laser-guided bombs’ rolling control channels, a sliding-mode variable structure controller is designed. By utilizing the consistent robustness of the system in sliding modes, the projectiles have good characteristics at all operating points . The controller has a linear part to control the dynamic characteristics of the approaching segment and the sliding mode to ensure the system’s final state characteristics. Simulation results show that the controller has good performance.