Abstract: Based on the long-term data and information collected from transitional region between oasis and desert at the transitional belt between Badanjilin desert and Tenggeli desert,research on the soil temperature change characteristics and the influence factors were carried out.Some analysis results were as follows:(1)The sandy soil temperature in different plots of transitional belt had obvious diurnal,seasonal and vertical pattern.(2)Compared with Tamarix ramosissima sand dune and Nitraria tangutorum sand dune,on the uncovered shifting sand dune,the soil temperature diurnal variation of 5 cm depth was obvious;diurnal change scale was get for 30.4 ℃.(3)With the depth increasing,the maximum and minimum of soil temperature was coming to late,and the temperature change range was to decrease.(4)Through grey-correlation analysis,major environmental factors affecting the sandy soil temperature were discovered,including vegetation coverage,meteorologic factors,the heat characteristics and moisture condition of sandy soil;the correlative coefficients between soil temperature and sunlight,air temperature,air moisture stress and wind speed were 0.726,0.833,0.545 and 0.592 respectively.