Abstract: The Duomeilinka National Wetland Park belongs to the permanent river wetland, which located in the convergent hinge of Sichuan Province, Qinghai Province and Gansu Province. Up to now, the investigation on the diversity of birds in this wetland park is fairly insufficient. From 2017 to 2019, the faunas, community structure and spatial types of wide birds in the Duomeilinka National Wetland Park were surveyed, including 90 residents (51.14%), 43 summer visitors (24.43%), 43 winter visitors (16.48%) and 14 passage migrants (7.80%). Among them, 111 species are Palearetic origin, 42 species are Oriental origin, and 23 species are widespread, which account for 63.07%, 23.86% and 13.09% of the total number of species, respectively. In total of 44 species of species protected birds are present in the wetland park, including 11 and 25 species respectively listed on China's National Protected Animals List Class I and Class II, and 8 species were listed on key protected animals of Sichuan Province. The results of G-F index showed that there was a great avian diversity of the genus and family level in the Duomeilinka National Wetland Park. In addition, some similarities and many differences in the avian diversity and community structure were also found among four habitats types through the analysis of the similarity index and G-F index. This study provides evidence to avian protection and the later stage management of Duomeilinka National Wetland Park.