Abstract: In order to effectively shoot homing torpedo at a submarine with available original position and course , this paper puts forward a concept of area shooting method of homing torpedo in which the fixed lead angle along a equal speed straight-running submarine is employed , and subsequently establishes a game model. An example is given to explain the determination of the fixed lead angle , and to verify that this method is effective when shoot homing torpedo at the equal speed straight-running submarine in a close or middle distance. The simulation results show that for the submarine sailing in fixed direction with a speed less than 20 kn , the hit probability is 0.8 within the range of 500~4 000 m and the fixed lead angles of 7~15 degrees.