Species diversities and amount changes of birds in three seasons (Spring,Summer and Autumn) had been investigated in 2006 at Suganhu Lake wetland which is separated two parts,the large and small Suganhu Lake. Forty seven species belonging to 11 orders,20 families and 38 genera were observed with line transect method.Of these birds,32 species are breeders,10 species are passage migrants and only 5 species are residents.Twenty four species were observed in Spring,32 species in Summer and 30 species in Autumn.The diversity index of birds is at the maximum (3.089 1) in Autumn in the Large Suganhu Lake region.The bird diversity index is relatively lower in the Small Suganhu Lake region than the large lake at all three seasons.