Abstract: Endangered plant Magnolia sargentiana is Chinese endemic species. In the year 2006,investigations were made on the habitats of wild Magnolia sargentiana in Sichuan and Yunnan provinces. It was found that there were 379 species of vascular plants,belonging to 104 families, and 233 genera, of which 17 families,26 genera and 39 species were ferns, meanwhile 87 families, 207 genera, and 340 species were seed plants. Besides analysis was made of the distribution types of families and genera of seed plants in the habitat of Magnolia sargentiana. The results showed that flora of seed plants in the habitat of Magnolia sargentiana was complex and abundant. The their origin was ancient and belonged to temperate zone,but the transitivity of flora was remarkable. Magnolia sargentiana had a limited distribution,and was only distributed in some areas of Sichuan and Yunnan provinces. The study of the habitat of Magnolia sargentiana would provide an important basis for its conservation.