In radar countermeasure, deception jamming can suppress target echoes effectively through small power. Since that interference signal enters radar receiver from the main lobe, it is hard to restrain it through the traditional means of anti-jamming. In order to accomplish radar anti deception jamming, in this article, a method was researched to confront deception jamming based on screening signal. The interfering channels in the repeater jammer can be limited, which could be used by the radar to guide jamming surveillance system effectively through the design and use of screening signal. As a result, the interference signal will lock the screening signal in frequency and wave shape, and the tracking signal is protected. Simulation result shows that this method can reduce interference probability of tracking frequency effectively.