滑动模态控制（ＳＭＣ）方法是最近提出的一种新的结构控制方法，该方法具有控制效果明显，鲁棒性好等优点。滑动模态控制方法中滑移面和控制律的确定是最为关键的两步，详细介绍应用ＬＱＲ方法确定滑移面的原理和步骤，并基于Ｌｙａｐｕｎｏｖ直接法提出了一种控制律。应用滑动模态控制（ＳＭＣ）方法和所提出的控制律，对一地震激励下的八层线性结构主动控制的算例进行了分析。分析表明，滑动模态控制方法是一种很有应用前景的结构振动控制策略。 The sliding mode control (SMC) method is a recently proposed new structure control method, which has the advantages of obvious control effect and good robustness. The determination of slip plane and control law in the sliding mode control method is the most crucial step. The principle and procedure of determining the slip plane by LQR method are introduced in detail. A control law is proposed based on Lyapunov direct method. The sliding mode control (SMC) method and the proposed control law are used to analyze an example of active control of an eight-story linear structure under seismic excitation. The analysis shows that the sliding mode control method is a promising method of structural vibration control.