[Objective] The relationship between the temporal and spatial variation of leaf area index(LAI) in Hailiutu River basin and some meteorological factors was analyzed after those meteorological factors were contrasted in order to provide theoretical bases for local reasonable development and the protection of ecological environment.[Methods] The time-space variation tendency of leaf area index in Hailiutu basin was analyzed using linear regression method based on image data of MODIS. And the correlations between LAI and different meteorological factors were analyzed.[Results] 90.87% of the research area's LAI value rised constantly, and only 8.77% of that declined. The annually averaged LAI was 0.0022/a.[Conclusions] Vegetation in the basin got better year by year. Precipitation was the most important impacting factor of vegetation growing under natural conditions. Mean temperature and relative humidity had little correlations with the leaf area index, implied that they had little effects on the vegetation growth of the Hailiutu River basin.