The three sample areas of original, degenerated and reconstructed vegetation in Huangfuchuan basin were chosen. The comparing analysis was carried on the species composition, dominant species important index and species diversity. The results showed that the species composition, dominant species construction and species richness of the reconstructed area had nearly approached the original vegetation area by over 20 years of small watershed reconstructing, and its ecological dominance was apparently higher than the degenerated area and the original vegetation area, but its life form spectrum and water ecotypes were similar with the degenerated area while different from the original vegetation area. Its species evenness and information diversity index were lower than the degenerated area and the original vegetation area. The problems of vegetation reconstructing methods and biodiversity restoration were discussed.