An effective scanning method realized by controlling the scanning angle was proposed aiming at the drawbacks in stable scanning phase of Terminal-Sensitivity Projectile(TSP) as low efficiency and false alarm.Firstlya model was established for the scanning phase of TSPand analysis was made to the scanning trajectory as well as the disadvantages of traditional scanning method.Subsequentlya search algorithm with a controlled angle was proposed and its principle was then detailed.Finallysimulation demonstrated that the proposed approach can significantly improve the combat effectiveness of the TSP.