“反冲运动”指的是当一个物质系统在向外发射其部分物质的同时，余下部分所产生的方向相反的运动．该作用过程系统动量保持守恒．中学物理中有一类关于两个物体相互作用而反向运动的所谓“类反冲运动”，本文就求解这类问题的位移关系作一探讨． 我们首先从一个典型例子开始讨 “Recoil movement” refers to the opposite direction movement produced by the remaining part of a material system while emitting outward some of its material. This action process system maintains momentum conservation. In the middle school physics, there is a so-called “kinetic recoil motion” in which two objects interact and move in the opposite direction. This paper discusses the displacement relationship of solving such problems. We start with a typical example