Breeding bird diversity were surveyed by line transect and fixed-radius point count methods in 3 habitat,arid grassland,typical grassland and wetland in Middle Inner Mongolia from May to June 2011.A total of 63 breeding species belonging to 25 families and 17 orders were recorded.Among them 12 were resident birds and 51 were summer visitors.Considering the avifauna,54 species (85.71%)belong to Palearctic Realm and 9(14.39%) are Oriental Realm.The bird diversity from the most to least richness in the 3 habitat surveyed by Shannon-Wiener index is wetland,arid grassland,and typical grassland.The value of evenness index was highest in arid grassland and lowest in typical grassland.