Bird diversity is a major component of biodiversity, and the study on bird diversity at Lugu Lake Wetland is of great significance for wetland conservation. From 2014 to 2016, we made 13 surveys of Lugu Lake, and in the winters of 2014, 2015 and 2016, we conducted comprehensive surveys of the water birds resources at the Lugu Lake Wetland. According to the results, there are 42 water bird species belonging to 9 orders and 10 families. There are 9 resident bird species, 33 winter bird species, 2 summer bird species, and among them, 6 species are distributed in Oriental, 34 species are distributed in Palearctic realm and 2 species are widespread. Two species are first-class national protected birds, accounting for 4.76 % of the world's species; four species belong to second-class national protected birds, accounting for 7.14% of the world's species; five species are Sichuan protected birds, accounting for 11.90% of the world total. 1 critically endangered species, 1 endangered species, 2 near threatened species and 32 least concerned species are found. Based on the species and numbers of birds recorded, we analyze the characteristics and seasonal variation of the bird community as well as the fauna specification, population and diversity of the birds at Lugu Lake Wetland. The results show that the bird diversity at Lugu Lake Wetland is decreasing because of recent human disturbance.