Abstract: Typical movable platforms such as aircrafts, ships, and submarines have complex magnetic fields. It is significant to obtain the magnetic field information for improving the magnetic field detection accuracy. Based on a brief summary of methods for modeling complex magnetic fields of these platforms, and taking into account the characteristics of satellites, a method for modeling the complex magnetic fields of satellite based on the multi-dipole magnetic model was proposed in this paper. There are two technical approaches: One was to create a single-machine magnetic model based on the single-machine magnetic test data and then combine all the models into a whole-satellite multi-dipole magnetic model; the other was to directly construct the multi-dipole magnetic model based on the test data of satellite magnetic. The magnetic field modeling, calculation and measurement verification of a satellite have been completed along the two technical paths above. The results show that the multi-dipole method is suitable for the rapid magnetic modeling and calculation of complex magnetic fields of the magnetic clean satellite with an accuracy of better than 0.2 nT.