Abstract: Space targets such as fast spinning invalid satellites threaten the safety of satellites in orbit，and the research on efficient removal of such high-priority targets has become an inevitable trend-By discussing different despun methods，a radially distributed electromagnetic despun formation strategy based on non-uniform magnetic field was proposed，which regarded the electromagnetic additional force generated by the rotating target in the non-uniform alternating electromagnetic field as the control force，adjusted the control current through the position，and used the numerical simulation method to verify the feasibility.The simulation results show that the output current of the electromagnetic coil is controlled by the distance feedback，which can reduce the relative distance variation between the electromagnetic satellite and the target and also the propellant consumption during the electromagnetic despun process.The feasibility of the propellant-free despun strategy can be realized by the distributive electromagnetic despun formation.

Key words: non-uniform magnetic field, electromagnetic additional force, radially distributed electromagnetic despun formation, alternating electromagnetic field, propellant-free despun strategy