Abstract: This article investigated the influence of land use/land cover change (LUCC) on temperature.By means of Pearson correlation and normalized root mean square error (RMSE),the reliability of the three kinds of reanalysis data used in Xishuangbanna was studied.The contribution that LUCC made to temperature was obtained from subtracting the reanalysis from the observed data (observation minus reanalysis,OMR).The results showed that ERA-40 was most reliable.The correlation between three kinds of reanalysis data NCEP-1,NCEP-2 and ERA-40,and observed data exceeded level 1% (P＜0.01).The RMSE was less than 1 in general.Among four weather stations (Menghai,Jinghong,Menglun,Mengla),both observed and reanalysis data had remarkable warming trends,but the speed of reanalysis was smaller than the observed.The terrible change of land covers had caused impacts on temperature.The OMR results showed land cover change around Jinghong station had contributed 0.084 ℃/10 a to temperature warming,0.072 ℃/10 a and 0.012 ℃/10 a to Mengla and Menglun respectively.Temperature of Menghai station seemed little affected by LUCC.Temperature of Jinghong station was most sensitive to LUCC.The OMR of decades indicated that LUCC during 1980s caused 0.09 ℃ warming.All of these mainly due to the decrease of forest,shrubland and paddy land.Besides,the extension of rubber plantation and built-up was also the cause of warming.