本文在分析现有网络入侵模式匹配BM 算法的基础上，提出了改进BM 规则匹配算法。该算法克服了传统BM 算法的缺陷，通过增加一个记忆因子记录上次匹配过程中的匹配后缀，可以加快入侵检测过程中规则匹配的处理速度，从而减少入侵检测系统的响应时间。关键词：BM 算法；匹配算法优化；入侵模式；Abstract: This article is the analysis of network intrusion BM pattern-matching algorithms based on the BM rules to improve the matching algorithm. The algorithm to overcome the traditional shortcomings of the BM algorithm, by increasing the memory of a factor the last match record in the process of matching the suffix, you can speed up the process of intrusion detection rules to match the processing speed, thereby reducing the intrusion detection system response time.Keywords: BM algorithm; matching algorithm optimization; invasion model;