According to the immunology principles of bionics, a new type of distributed model of intrusion detection system based on immunology was presented. Short sequences of system calls and parameters executed by privileged procedure were vie-wed as analogous to peptide. 基于仿生学的免疫原理,将肽链定义为在操作系统中由特权进程执行的系统调用及参数短序列,提出了一个基于生物免疫学的分布式入侵检测系统模型。