Abstract: The flywheel is one of the major sources of interference for a high-accuracy satellite attitude control. This paper studies the flywheel disturbance coupling problem of FengYun-3 (01) satellite in orbit, analyzes the main factors for the flywheel to generate disturbance, and presents the results of several different solutions and improvement measures in detail. The results can provide a useful reference for further studies of flywheel disturbance suppression and measurement.