Abstract: With the continuous development of stealth & anti stealth technology and maneuverable penetrating air defense strategy mass military application, target electromagnetic scattering characteristics research has great significance for both the offense and defense. Based on F-22 model typical stealth target, This paper combines target, radar related position with whole airspace RCS database, analyses the target from different situation, which links radar baseline lengths and radar station related positions with bistatic radar equation. The result of simulation indicates that when the radar baseline length increasing, bistatic radar detection range presents a trend of increasing first and then decreasing, and radar related position affects its detection range and distance severely. This result provides theoretical analysis and experimental evidence for early-warning radar maneuverable penetrating and anti-stealth ability.