阐述了烟幕在光电对抗中的作用和干扰机理 ,介绍了对抗可见光、红外和激光的三种烟幕的典型组份 ,简介了烟幕器材 ,并指出了今后的发展趋势 The effect and interference mechanism of smoke screen in photoelectric countermeasure are expounded. The typical components of smoke screen against visible light, infrared and laser are introduced. The smoke screen is introduced, and the future development trends are pointed out.