Abstract: A reseeding study was carried out on the Tianzhu degraded grassland from 2007 to 2009 to explore the effects of reseeding on species richness and aboveground biomass. The results showed that: After reseeding, the species richness increased in 2007, but decreased after 2007; It was increased that the vegetation height, coverage and aboveground biomass, and more, there was especially significance about the aboveground biomass of grass. Therefore, according to comprehensive evaluation based on vegetation height, coverage species richness and biomass, it was more efficient to recover degraded grassland reseeding with Elymus nutans+Bromus inermis+Festuca sinensis, and this method should be used in recovering alpine degraded grassland in Tianzhu county.