Using the 1981-2015 GIMMS NDVI long-time series data set,the changes of relative humidity and vegetation index around Mu Us sandy area were studied.Based on GIS and remote sensing,analysis was done from the perspective of time,space and stability.①From 1981 to 2016,the relative humidity of Mu Us peripheral the area showed a decreasing trend,but the relative humidity has increased from 2006 to 2015.The space distribution change trend is from southeast to northwest and gradually reduced.The relative humidity at the edge of the sand is less variable than the Ningxia Plain,with the Yellow River flowing through the lot and the southeastern part of the mountain.②In the past 35 years,NDVI has increased in Mu Us peripheral area,and between 2006 and 2015,NDVI rose rapidly.Spatial rendering mode is the east and southeast high,northwest low.(3) NDVI was positively correlated with precipitation,and had weak positive correlation the relative humidity.In the relatively stable climate (1981-1996),NDVI showed the same trend with precipitation and relative humidity.In the period of rapid climate warming (1996-2015),the NDVI value of returning land for farming to forestry is increasing,and it also weakened the decline of precipitation and relative humidity.To a certain extent,the increase of vegetation in the area around Mu Us desert alleviates the negative effect of rapid warming on relative humidity.