Abstract: Based on the data of species of Fagaceae, surveyed from 15, 000m2 of 69 plots in 12 counties and cities, in mid-subtropical evergreen broadleaved forests in northern and central Fujian Province, and of the agglomerative analysis between the similarity indexes of some counties and the different species of the family these species may be divided into two area groups, i.e. the northern Fujian area group and the central Fujian area group.According to the analysis of the different species of the family in the surveyed counties by the polar ordination method, it is clear that in the mid-subtropical zone of Fujian, they are not alike all the areas: altitute increases positively with rainfall and negatively with temperature. Therefore this shows the comprehensive effect of the geographic elements, (temperature and rainfall) on the ecological distribution of these species. Analysis of the ecological amplitudes among these trees indicates that Castanopsis eyrei, C. fargesii, C. fordii and Cyclobalanopsis glauca are broad-distribution species, but Castanopsis sclorophylla and C. jucunda are representative species of the northern Fujian area, and C. carlesii and C. kawakamii are representative species of the central Fujian area.