The affection of the thermal to the differential laser gyro's null shift is analysed in this paper, some method of making the thermo effect more smaller is proposed, and the temperature field is measured by experiment. 本文简要分析了四频差动激光陀螺开机后热场的变化对零漂的影响(即陀螺的热效应),提出了一些克服热效应的方法,并测量了陀螺热场。