The threats of laserwhich come from laser guided weapons, lidars and laser rang finders and so on are analyzed in this paper. It is effect to decrease the laser threats by lowering permeation ration of laser through the atmosphere, reducing the laser energy coming from the target and by laser decep tion jamming technology. Now composite guiding ways are widely used in weapon systems, it is an important task to realize composite stealth. In this paper ,the laser protection theories and techniques are also summarized.