随着高速网络技术的发展，网络入侵检测系统（NetworkIntrUSionDetectionSystem），简称NIDS，正面临着巨大的挑战。在当今高速网络环境下，需要检测的数据急剧增加，传统的NIDS存在严重的实时性能瓶颈问题，这可能导致丢包和错误检测的发生。本文首先分析传统的网络入侵检测系统，然后将改善的负载均衡技术引入网络入侵检测系统以适用于高速的网络环境。“,”With the development of high-speed networks,network intrusion detection system(NI DS) is facing a huge challenge.Due to the dramatical increasing of data need to be detected,the tra ditional NIDS has a serious problem with handling heavy traffic loads in real-time ,which may res ult in packets loss and error detection. In this paper we will analyze the traditional NIDS and intro duce the improved load balancing scheme into NIDS to make it more suitable to high-speed netwo rks environment.