Intrusion detection is very important in information system. It can act as firewall and data encryption techniques to protect information system against virus attack. Intrusion detection system is designed to identify the malicious behaviors in networks and responding to them. Since it's the important component of the security system, more and more researchers pay attention to it. But current intrusion detection systems can't give effective response when the data are very large, and also can't meet the high-dimensional deformation of the network packet processing needs.