Most of the current ship magnetic field model is constructed through its static characteristics，and the practical applicability is poor. This paper focuses on different headings and navigation areas’ adaptive model of moving ship’s magnetic field. Firstly，the equivalent source method of ship magnetic field modeling is analyzed. Then the principle and method of magnetic field’s magnetic moment decomposition of moving ship are studied. The main idea is to measure the three-component data of a magnetic field in a plane under the ship in the east， west，south and north headings，the 4 sets of data are separately used as the boundary condition of the same ship under different magnetization states to solve the magnetic moments of the ship in 4 different magnetization states. Finally the fixed magnetic moment and inducted magnetic moment parameters of the magnetic source are jointly solved. Through the above process，the magnetic moment of the ship in any heading and any sailing position can be calculated，and the magnetic moment is used to solve the magnetic field to obtain the magnetic field model of moving ship.
