Abstract: In order to realize the multi-spectral imaging of the optical remote sensor, a filter mechanism based on large thin-walled bearings is designed to drive the filters with different spectral transmittance into the optical paths in time for synchronizing the detector imaging. The composition and the working principle of the filter wheel are discussed. The performance test and the environmental test of the mechanism are carried out. Before and after the experiment, the margins of the stiffness and the moment of the mechanism are tested, to be better than the requirements. After the experiment, the bearing is disassembled in order to evaluate the natural life. The results show that the bearing wear is normal and no failure occurs at the end of life. The comparative analysis shows that the design of the filter wheel mechanism based on the large thin-wall bearing is feasible, which provides a reference for the mechanism design of the long-life space remote sensor.