Abstract: Fly wheel system is widely used in majority of spacecrafts to control three axes attitude recently. Its precision is higher than that of small thruster system. But the magnetic suspension momentum wheel has better performance than the conventional ball bearing momentum wheel in spacecraft attitude control. The gimbal magnetic suspension momentum wheel developed from the ordinary one can adjust the angular orientation of its spin axis and complete three axes attitude control in high precision separately, which has great value in practice. Simultaneously, the study for gimbal magnetic suspension momentum wheel can benefit the integrated power and attitude control system technologically. This paper describes the research status and development of the gimbal magnetic suspension momentum wheel in detail. Then the key technologies are analyzed. Finally the example of structure design is introduced.