等效转化法”是解决物理问题的常用方法之一 ,它是从两个事物之间的等同效果出发 ,将复杂、陌生的问题进行分析、变通 ,转化为标准的物理模型 ,从而找到解决问题的途径 ,使问题得以快速解决。按照“等效转化法”的转化形式之别 ,可将其分为 :分解转化、合并转化以及虚拟构建转 “Equivalent transformation method” is one of the common methods to solve physical problems. It starts from the equivalent effect between two things, analyzes and adapts complicated and unfamiliar problems, and turns them into a standard physical model, so as to find a solution to the problem. In order to solve the problem quickly, the “equivalent transformation method” can be divided into: decomposition, merger, transformation and virtual construction.