Abstract: The anti-tank missile javelin developed by America was a kind of portable single soldier anti-tank missile. Javelin was nowadays a sort of when shooted no controlling anti-tank missile. So it was one of the most advanced anti-tank missiles. The core technology of Javelin was the advanced guided mode. The advanced guided mode was analyzed and studied. Firstly the technical characters and the system composing were summarized. Secondly we mainly analyzed the guided mode, including aiming, emission, flying and hitting. Then the guided process and principle were studied. The main technical performance and the key technologies were analyzed. Finally, the technical improvement program and the developing trends were introduced.