Vegetation always represents the state of land cover change. It plays an indicator role in global change. It is a sensitive index of climate and human factors to environmental impact. And in arid and semi-arid areas,climatic conditions are the direct driving forces and important factors of vegetation growth and development. Vegetation coverage not only reflects the local dry and wet conditions,but also an important indicator of local drought resistance. Based on two kinds of Normalized Difference Vegetation Index (NDVI) data,the temporal and spatial variation of spring vegetation cover over the Loess Plateau has been discussed from 1982 to 2014. The spatial distribution of vegetation coverage in the Loess Plateau is basically consistent with the two NDVI data of GIMMS and MODIS. During 1982-1999,the integral NDVI in the Loess Plateau was increased. The increase rate was even greater in 2000-2014. The linear variation of NDVI and spring precipitation in the Loess Plateau is different. Because the spring precipitation in most area of the Loess Plateau was decreased in 1982-2014,it may not cause the change of spring NDVI. The standardized precipitation evapotranspiration index (SPEI) was used to characterize the spring drought in the Loess Plateau. Before 2000,when a severe spring drought happens,as in 1995 and 2000,the integral NDVI in Loess Plateau decreased significantly; for normal years before 2000,the correlation between NDVI and spring drought was weak. But after 2000,the correlation between NDVI and SPEI become strong and significant,which may be connected to the ecological restoration in Loess Plateau. In the past 2000-2014 years,the most significant increase of NDVI appeared in farmland and grassland,which should be mainly attributed to the ecological recovery project leading by local government in the 1990s,aiming to turn farmland into forest and pasture into natural grassland. Because of the human activity,the response to the spring drought in farmland is usually weaker than in grassland and forest area. In the comparison of interannual variability, the highest degree of correlation between the grassland and forest NDVI and the correlation coefficient of first leading EOF mode of SPEI,followed by the crops,and the last is the shrub. In addition to the drought tolerance of different vegetation,this difference may be related to geographical location. As a result,we can expect a more intensive response of vegetation to spring drought in Loess Plateau if the local ecological environment in Loess Plateau keep improving.