Abstract: Based on the data of annual mean air temperature (hereinafter referred to as “MAT”) and mean ground temperature (hereinafter referred to as “MGT”) at 0~20cm soil depths of Enshi of nearly 50 years from 1966 to 2016, taking methods of linear propensity estimation, statistical regression and Mann-Kendall, this paper analyzed the interdecadal and seasonal variation, abrupt change, and change of difference between both of MAT and MGT at different depths. The results showed that MAT and MGT at different depths mainly displayed significant increasing trends in past 50 years. The interdecadal MAT and MGT presented obvious periodic characteristics—a downtrend from the 1966~1996, a distinct uptrend since the 1997, and a peak in the decade of 2006~2016. Both MAT and MGT at different depths showed fluctuations during the period from the 1966 to the early 1980s; and followed a cooling trend, especially obvious with the MGT, from the early 1980s to the early 2000s. The MAT abruptly changed to a warming trend in 1998, and the trend was particularly distinct during the latest decade. And the abrupt change of MGT at different depths occurred in 2001, which was 3 years later than MAT. There were good consistency of the seasonal variation trends of MAT and MGT at different depths. The ascending range of MAT and MGT at different depths was most obvious in spring, and least obvious in summer. In spring, the ascending rate of MAT was larger than that of MGT at different depths, in summer, both MAT and MGT at different depths presented a warming trend, whereas which was not very obvious, in autumn and winter, with the increase of the soil depth,the climate tendency rate grew smaller, and warming trend less conspicuous. Difference between MAT and MGT was positive in last 50 years. Difference between MAT and MGT at 0cm depth showed an increasing trend, and that between MAT and MGT at 5~20cm depths had a decreasing trend, and the decreasing range was larger with the increase of soil depth.