In order to reveal the temporal and spatial changes of vegetation cover in Lvliang Mountains, clarify the mechanism of influence of climate factors and their interactions on vegetation change, and provide guidance for long-term stability and benign development of vegetation and active response to subsequent climate change,based on NDVI（normalized difference vegetation index）and meteorological data from 2002 to 2022, the relationship between NDVI and meteorological factors was analyzed by using geodetector. The results showed that vegetation NDVI showed an increasing trend from 2002 to 2022. The spatial vegetation cover was lower in the northwest and higher in the southeast. From 2012 to 2022, the vegetation cover was 30.68% from lower cover, low cover, medium cover to higher cover and high cover.At different time scales, NDVI responds differently to climate factors, and the interaction is greater than the interpretation of single factor to NDVI. The combined effect of average annual temperature and average annual precipitation from 2002 to 2012 reaches the maximum explanation of 0.685.