Abstract: Abstract:This paper takes McDonald's and KFC restaurants as the representative of Multinational chain catering enterprises, Mainly studies on the spatial diffusion and mechanism of McDonald's and KFC restaurants within third ring road in Fuzhou from 1994 to 2014 by use of the GIS spatial analysis. The research shows that: Frist, The spatial diffusion of transnational chain catering enterprises within third ring road in Fuzhou follows the rules of "random to cluster to disperse", and distribution of transnational chain catering enterprises are the whole scattered and local agglomeration, the development of agglomeration areas from a single center to multi center, Dongjiekou district, Taijiang district and Wanbao district, which are the Main hot zones of the spatials distribution of restaurants. Second, The restaurants were spread to the East, South and west around the Bayiqi road, and the number of transnational chain catering enterprises in the South and west is more than in the north and east in the future, which is consistent with the commercial spatial structure evolution and the direction of urban spatial expansion. Third, There is unevenly distribtion in the different areas; With the passage of time, there are more and more McDonald's and KFC restaurants in the second ring road and third ring road, so the number of transnational chain catering enterprises gradually tend to be balanced in each ring load; along with the mian line of the subdensity ribbon in the spatial distribution; transnational chain catering enterprises are gathered near the traditional trade area in the spatial distribution. Lastly, the study shows that some factors are affect the spatial diffusion of transnational chain catering enterprises, such as the regional economy, population distribution, road traffic factors, the develompent of urban and policies and regulations and so on.