the influence of temperature on the static output of FOG before and after real-time treching compensation are Experimentally tested. the temperature change during 1-3600 seconds, temperature changes in the procedure as follows: room temperature →30℃ , each temperature point is maintained for 10 minutes. the output of FOG before real-time tracking compensation is shown in Fig.8, and Fig.9 is the output of FOG after real-time tracking compensation. the Gyroscope zero-bias and zero-bias stability of the test results as shown in teble 1. It can be seen by the test results that the temperature change on Y waveguide have a significant impact on the fiber optic gyro zero-bias stability, and reduce the precision of FOG. By adopting real-time tracking compensation, the zero-bias stability has been improved from 0.033888 to 0.010449 , and the precision of FOG has been improved greatly.