Abstract: In virtue of Relevé method, and referring to a great deal of literature, a systematic vegetation survey was conducted in Xuzhou city, Jiangsu. There were 747 species of seed plants there, which belonged to 120 families and 366 genera. The analysis of seed plants families in Xuzhou, Jiangsu province showed that the temperate areal-types were dominant and their genera number were 196, which accounted for 18.35% of total genera number in China. The second place was the tropic areal-types, the genera number of which was 111, occupied 7.28% of total genera number in China. Areal types of genera of seed plants in here played typical characteristic of south-north transition. The temperate areal-types were full developed and became the dominant elements of seed plants in Xuzhou.