Trojan horse’s prevention and control is an important part of malicious code prevention and is indispensable of the whole network security protection system, Trojan horse technology is in the unceasing progress, the corresponding countermeasures are also required to follow up, First of all, this paper studies the anti-stealth strategy in the different Trojan horse confrontational environment,then compares the Trojan horse prevention and control ability on different modes,at last analyzes the Trojan horse prevetion at system level.