In three-floated gyroscope（ TFG）

precision of the float component centering in magnetic suspension system（ MSS） has a direct impact on the overall performance and accuracy of gyroscope. In order to improve the performance and accuracy of the instrument

the optimum design of TFG MSS is carried out

and a new MSS with full-cycle decoupling control which can effectively restrain gyro drift and accelerate system response speed is designed. The experimental results show that the TFG drift is reduced to 62 %

and stabilization time is reduced to74 % under the new MSS.