A survey on the urban birds was conducted in Mudanjiang city,Heilongjiang province from May 2004 to April 2009. The survey duration covered an entire 12 months. Totally,91 species of birds,belonging to 14 orders,31 families were recorded,which account for 7.69% of total species in China.The species richness index is 1.967,evenness index is 0.653 8,and Shannon-Wiener index is 2.949. Among the 91 species of birds,26 species are residents,53 species are summer residents,3 species are winter residents,9 species are migrants passing by,occupying 28.6%,58.2%,3.3% and 9.9% respectively. Summer resident is dominant component of avifauna in the study area;five species are oriental species (5.5%),54 are Palaearctic species (59.3%) and 32 cosmopolitan species (35.2%). Eight birds have been listed as national second class protected species including Accipiter virgatus and A.gentilis. Bird Passeriformes is the largest group including 52 species belonging to 15 families.