This paper studies the development trend of intelligent mobile phone, confirmed the necessity of research on intelligent mobile phone malicious code. Study on the detection technology, proposed intelligent mobile phone regular networks and random networks based on malicious code propagation model, propagation mechanism is studied. Set up a perfect malicious code discovery and defense system model, at different levels is put forward that different, prove the necessity of scanning algorithm and Semantic Detection Algorithm for eigenvalue. To improve the security of the whole communication network. OverviewAlthough the harm of intelligent mobile phone malware is not very serious, but relates to personal data and the issues of cost, but with the increasing proportion of data services, intelligent mobile phone platform to the operation of the PC machine platform, if we do not timely malicious code found and defense method, intelligent mobile phone malware will affect the whole communication network security. Therefore, we need to come up with the perfect solution to the problem of intelligent mobile phone malicious code. Discovery technologyAt present, the intelligent mobile phone common malicious code found methods mainly refer to PC malicious code analysis techniques. On the current situation, modern intelligent mobile phone antivirus product basically can achieve efficient real-time scanning monitor, killing the virus, update the virus database, its basic communication equipment related to the increasingly approaching perfection. But previous antivirus means basically is based on signature scanning technology, this technology has many advantages, but for unknown malicious code is incapable of action, and that means more passive defense 【1-2】