The growth,uptake and accumulation of nutrient of 5 leguminous green manure crops were compared to screen suitable species for citrus orchard at Three Gorges Reservoir under field experiments.The results showed that hairy vetch was on the top of long growth period,followed by smooth vetch and common vetch,which were 23-38 days longer than that of Chinese milk vetch.Smooth vetch,hairy vetch and common vetch grew and covered better before winter,while Chinese milk vetch and white clover grew faster in spring.The yield of fresh grass and the accumulation of N,P and K of smooth vetch were the highest at full flowering stage,closely followed by hairy vetch,common vetch and Chinese milk vetch,the smallest was white clover.All of 5 leguminous green manure crops could normally grow and accomplish their life cycle in citrus orchard at Three Gorges Reservoir.Smooth vetch was the most appropriate for better growth vigor and more nutrients accumulation.