Abstract: From 2019 to 2020,the bird diversity was surveyed in the cost of Liaoning coastal (circum-Bohai-Sea region) at the spring migration season, autumn migration season, breeding season and winter season. We recorded a total of 150 bird species representing 16 orders and 38 families. For all 150 birds, 25 species are residents, 26 species are summer visitors, 26 species are winter visitors and 73 species are passage migrants. Among them, there were 11 and 20 species among national class I and II key protected birds. The diversity of bird showed an obvious seasonal difference in this survey. Spring migration season and autumn migration season were higher than other seasons. The species and number of birds were lowest in winter season and contained the lowest Margalef, Pielou, Shanoon-weiner and Berger-Parker index. The study area show that the species and number of birds were most in Panjin area, about 473084 birds belonging to78 speciesndex; The species of birds were least in Yingkou area, about 55 species; The number of birds were least in Jinzhou area, about 57723 birds. Compared with the bird diversity, Panjin area is the highest and Dalian area is the lowest. The species composition of bird showed an obvious difference, which is affected by the number and area of bird habitats in study area.As a key area of migratory birds from Liaoning coastal (circum-Bohai-Sea region) to East Asia-Australasia which is facing disadvantageous situations such as the decrease of bird habitats caused by climate change and interference of human reclamation. It is suggested that bird diversity and habitat should be protected by expanding the scope of conservation areas, implementing restoration and management measures, and strengthening publicity, so as to consolidate the effectiveness of comprehensive management of Liaoning coastal (circum-Bohai-Sea region).