Abstract: The vegetation index product MOD15A2 and vegetation type product MCD12Q1 of EOS/MODIS data and meteorological data were used in this study. LAI of seven typical vegetation types were compared,and spatial temporal change of LAI in growing seasons in Hebei province from 2002 to 2011 was explored by using linear regression analysis and correlation analysis methods. The relationship between LAI, air temperature and precipitation were also analyzed. The results showed that the annual average LAI values in growing seasons(from May to October)were 1.0-1.3, the highest was 1.286 in 2008, and the lowest was 1.066 in 2002. As for spatial distribution, LAI in Chengde region in the northeast was the highest, which reached more than 5.0, and LAI in Zhangjiakou region in the northwest was the lowest, which reached less than 0.5. The annual average LAI of seven typical vegetation types in growing seasons were very different, and LAI from high to low could be broadleaf forest(2.765), mixed forest(2.535), shrub(1.867), savanna(1.476), coniferous forest(1.331), farmland(1.116)and grassland(0.967). The significant factors influencing LAI were precipitation, air temperature, topography, vegetation types and phenology, and the impact of each factor on vegetation LAI was different.