本文介绍了一种 NP（Network Processor）多线程防火墙的设计方案。首先介绍了NP多线程防火墙的工作原理，然后提出了对该防火墙的体系结构设计，通过对各功能模块的分析，给出了具体实现方案方案，最后阐述了所设计的NP 多线程防火墙的优缺点。关键词:多线程 防火墙 网络处理器Abstract:This paper has introduced one kind of design proposal of the NP (Network Processor) multithread firewall. At first the work principle of NP multithread firewall had beenintroduced ,then proposed to this firewall system structural design, through analysed the various function modules, has produced the realization ways, finally elaborated the designed NP multithreading firewall good and bad points.Keyword: multithread, firewall, Network Processor