Objective To study faunal characteristic of Sarcophagidae in Liaoning province, China. Methods During 2010-2015, fly investigation was conducted in eastern Liaoning Changbai mountain, western Liaoning-Hebei hilly area, northwestern Liaoning Nuluerhu hilly area and Liaohe watershed by insect netting. Flies were collected from different geographical landscapes, then pinned and identified by morphological taxonomy. Sarcophagidae fauna was classified by ecology and zoogeography principles. Results In total, 94 species of Sarcrophagidae flies belonging to 30 genera in 3 subfamilies spread over Liaoning province. Judging by the distribution of the flies in the natural areas, the Sarcophagidae belong to Northeast China of Northeastern Asia in Palaearctic Region. It has the highest common component with the Oriental community, most endemic species, and the closest similarities. Followed Palaearctic Region were New Northern, African, Australian and New Tropics. The highest domestic similarity was found with North China, followed by Mengxin, Central China, Southwest, Qinghai-Tibet and South China. Conclusion Geological structure conditions is one of the important factors to cause the species diversity of flies. The distribution of the flies in each region is in accordance with the climatic and geographical conditions of the region, but also with the region's climate and land geological history consistent, especially the Quaternary glacial, where the distribution of flies coincides with the dramatic changes in climate and the natural environment. The southward glacial ice sheet climates forced the northern part of the forest flies following the Taijialin moving southward. In the process of long-term natural selection of Sarcophagidae in Liaoning province, the composition of complex and a variety of unique faunal features were established.