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Aiming at the problem that existing software diversity evaluation methods generally adopt single feature,a software diversity evaluation method based on multi-granularity feature is proposed.This method analyzes four granularity of program:instruction,function,basic block and binary file.First,different granularity are obtained by small prime product method and dyna-mic weight distribution algorithm.Then,the granularity is analyzed according to the effectiveness of diversification technology.In the experimental part,GNU coreutils is used to comprehensively evaluate 7 software diversification methods.The result is analyzed to verify the applicability of the evaluation algorithm.Experimental results show that this evaluation method can accurately evaluate the effectiveness of software diversification methods from both vertical and horizontal directions,which has reference value for the research direction of subsequent diversification technology.