作为战术反潜的主要手段，反潜直升机已成各国海军的重点装备。首先介绍了反潜直升机反潜作战的一般过程、潜艇规避模型以及对反潜搜索策略的影响。考虑潜艇转弯所带来的时延影响，潜艇的分布将呈现桃形分布。针对螺旋搜索策略，在分析潜艇速度对搜索条件影响的基础上，结合声纳有效作用范围，获得了典型条件下确保潜艇无法穿过声纳有效作用区域的最大单机搜索角度为110°。进而提出了4机联合搜索策略，为实际战术的应用提供了理论支持。

As an important anti-submarine mode, the antisubmarine helicopter has become one of the key equipments of the navy in different countries. First, the process of anti-submarine operation, the avoiding model of the submarine and its effect on submarine searching strategies were introduced. Considering the effect of time delay due to turning, the distribution of submarine is similar to the shape of a peach. Towards spiral search pattern, considering the estimating error effect of submarine velocity and effective coverage of sonar, the biggest searching angle of singular helicopter is about 110° under typical initial condition. Then, a joint searching strategy of four antisubmarine helicopters was proposed, which provided a theoretical support for the tactical application.