[in Chinese with English abstract: ] Yunnan Province is very rich in Lichen plant resources, of which many kinds can be provided for the exploitation and utilization in food, vege- table, perfume, medicine, and dyestuff, etc. In their studies on the exploitation and utilization of Lichen plants, the authors examined the constituents of seven species of Lichen plants. The names of these plants and the isolated chemical constituents are as follows: 1. Alectoria asiatica DR. ...Usnic acid (1 ). 2. Alectoria sulcata Nyl. ...Virensic acid (2 ), Ethyl haematommate (3 ), Rhizonic acid (4 ) and Haematommic acid (5 ). 3. Usnea longissima Ach. ... Usnic acid (1) and Ethyl everninate (6). 4. Usnea comosa (Ach.) Röhl. ... Usnic acid (1) and other two new compounds. Their structures will be published elsewhere. 5. Cladonia arbuscula (Rabh.) . ...Usnic acid (1), Ethyl haematommate (3) and a new depsidone. The structure will be published elsewhere. 6. Oropogon loxensis (Fée) Th. Fr. ... Atranorin (7) and Virensic acid (2). 7. Anaptychia boryi (Fée) Mass. ... Atranorin (7), Ethyl haematommate (3), Rhizonic acid (4) and Zeorin (8). Based on the above analysized data, Alectoria sulcata and Anaptychia boryi may be a good material which can be used for producing Lichen perfume as "tree moss concrete"; Usnea longissima, U. comosa and Cladonia arbuscula can be used for producing Usnic acid; and Oropogon loxensis is very rich in Atranorin and Virensic acid. Key words: Lichen plants, Chemical constituents; Perfume; Mcdicine.