In order to increase the traditional on-call submarine search efficiency by anti-submarine patrol aircraft, a method of using anti-submarine patrol aircraft dropping multistatic sonar array is presented. On the basis of the traditional method, according to the known information of submarine, taking advantage of the multistatic sonar, cycle, square and triangle anti-submarine patrol aircraft on-call searching models are dropped, using acoustic attenuation principle, through Matlab, the influence of the initial distance, initial position of the submarine, submarine economic speed, dropping radius and dropping quantity on searching submarine efficiency is analyzed. The simulation results shows that, under the same condition, searching submarine efficiency of three methods decreasing with the increase of the initial distance, initial position of the submarine, submarine speed, searching submarine efficiency of circle multistatic sonar array is the best and comparing with the circle passive buoy array search efficiency increase obviously, and according to the actual situation to choose the appropriate dropping radius and dropping number. This method is suitable for anti-submarine patrol aircraft on-call searching submarine and has some significance on anti-submarine warfare.