Abstract: The sloping land was used as control, and the water conservation capacity of broadleaf forest , Pinus massoniana forest, pine and cypress mixed forest, citrus orchard and shrub was studied in Danjiangkou reservoir area. Then we used the method of analytic hierarchy process(AHP) to evaluate the water conservation capacity of six vegetation types. The results showed that the average canopy percentage of interception was 20.64%; the average waterholding capacity of litter form was 1.85mm; the average waterholding capacity of soil was 879.78t/hm2; the average surface runoff was 251.9mm; the average soil erosion was 10.40t/hm2. The water conservation capacity of six vegetation types was in order that broadleaf forest was the best, followed by pine and cypress mixed forest, P. massoniana forest, citrus orchard, shrub and sloping land.