With the greatly improved performance of submarine launched heavy torpedo and the requirement of intelligent operation, it is necessary to realize the long range heavy torpedo’s maneuver search that can cover the target’s location error which results from projecting platform’s position precision and the target’s intentional maneuver after submarine launching the torpedo. Realizing it can also make the long range heavy torpedo adopt well to the changed strike tactics -point to area. After defining the concept of heavy torpedo’s maneuver search and analyzing the occasion of using maneuver search, this article constructes the techonology framwork of the heavy torpedo’s maneuver searching trajectory.