关于SFS算法的介绍，介绍了近些年来SFS方法的发展现状，将SFS算法划分为四种类型：演化和偏微分方程(PDE)方法、最优化方法、局部化方法以及线性化方法。同时，分析了各种SFS算法的特点，并对SFS技术的进一步发展趋势进行了展望。-Introductions of SFS algorithm, this paper introduces the development status of SFS method in recent years, the SFS algorithm is divided into four types: evolution and partial differential equation (PDE) method, the optimization method, the localization method and linear method. At the same time, analyzed the various characteristics of SFS algorithm, and the further development of the technology of SFS trend is prospected.