Abstract:During the 1958-l979 years, at the Yunnan Riogeocoenological Station of Tropical Forest, the writer made a survey of the flora of tropical rain forest by the quadrat method of phytocoenology in Xishuanghanna of the southern Yunnan. Through putting to order the recent materials, the species cormophytes (in- cluding bryophytes, pteridopllytes, gymnosperms and angiosperrms.) have reached a total of 364 in the area of 1.57 ha, distributed among 121 families.