In order to improve the interception performance of sensitive rocket, the research and discuss of independent search technology were carried out in this paper. Through establishing the motion model of sensitive rocket, the motion model of incoming ammunition, the judgment model and error model of projectile target intersection, the independent search ability of sensitive rocket at different intercept distance to incoming projectiles with different flight speeds was simulated, and the law of independent search probability changing with the variation of intercept distance and the speed of incoming ammunition was obtained, which could provide references for the overall design and interception strategy of the sensitive rocket interception system. The results demonstrate that sensitive rockets can shoot up to 3 shots, and its independent search probability can reach more than 97％.