Hemispherical Resonator Gyro(HRG) is a new solid state vibrating gyro with highprecision,highreliability and longlife.In order to make HRG applicable to the platform inertial navigation system,the performance index of the dynamic characteristic,bandwidth and precision are improved by improving the control circuit of the HRG.The test results show that the dynamic measurement range of HRG is up to -60～+60 (°)/s,the bandwidth is extended to ≥75 Hz,and the bias drift is up to 0.06 (°)/h.It can satisfy the application requirement of the platform inertial navigation system.