At small spatial scale,the study on relationship of vegetation with climate change to find key climatic factor affecting vegetation changes has important significance for vegetation reconstruction and ecoenvironment restoration. The temporal evolution of vegetation and the dynamic changes of climate were analyzed using the Normalized Difference Vegetation Index(NDVI) obtained from the NASA/AVHRR sensor (1982—2006) and corresponding meteorological data at four stations in Huangnan Tibetan Autonomous Prefecture. Further,the relationships between the NDVI and climatic factors were calculated. Results indicated that from 1982 to 2006,the NDVI in Jianzha County slightly decreased. In Tongren County and Zeku County,the trend of decline was significant,while in Henan Mongolian Autonomous County,the NDVI increased. The drier and warmer tendency was very obvious and the air temperature averaged over the four counties remarkably increased by 0.67 ℃ per decade over the past 25 years. Precipitation in Tongren County slightly decreased,while in other counties,rapidly decreased,with an average of 24.82 mm per decade. In Jianzha County and Tongren County,the most important climatic factors influencing the variation of the NDVI were precipitation and temperature; the relation between the NDVI and precipitation was positive; and the correspondence between the NDVI and temperature was contrary. In Zeku County,the NDVI was jointly affected by pan evaporation,hail weather process,and frostfree days. The increased NDVI was primarily caused by increase of sun hours in Henan County. The climate warming was of advantage to the NDVI growing in Zeku County and Henan County. In the process of vegetation restoration,Jianzha County and Tongren County should focus on moisture insulation works. For the similar studies at small scale,the results have great significance as well.