Based on the performance and features of the anti-submarine patrol aircraft and the airborne magnetic detector, the model for patrol search situation analysis, which meets the three requirements, is established. Two types, totally three kinds of patrol search methods are proposed for magnetic detector. Considering the V-H fuzziness of enemy submarines, the adaptability of different patrol search methods is studied through simulation calculation. The detection probability calculation model of patrol search of anti-submarine patrol aircraft using magnetic detector is set up.The study supplies a theoretical and technical support for the patrol search of anti-submarine patrol aircraft with magnetic detector.