:空空导弹采用激光近炸引信可以对目标实施全向攻击。但由于迎头和尾追两种极端的交会状态导致了交会速度的极大差别 ,以致很难确定起爆延时 ,使导弹对目标的杀伤效率降低。如果引信能自行识别交会的状态 ,就可以采用不同的起爆延时 ,使问题得到解决。文中对上述问题进行了分析 ,提出了在激光引信上复合红外探测通道的解决办法 : Air-to-air missiles using laser near-fuze can make omnidirectional attacks on the target. However, due to the extreme head-to-tail chase and the two extreme rendezvous states, the rendezvous speed is greatly different, making it very difficult to determine the detonating delay and reduce the missile’s killing efficiency on the target. If the fuze can identify the status of rendezvous on its own, different initiation delay can be used to solve the problem. In this paper, the above problems were analyzed, and the solution of compound infrared detection channel on laser fuze