During the symposium in Beijing (1983),the Group on the systematics of Volcanic Rocks of the Commission on Petrology of the Geological Society of China agreed on recommendations on the classification and nomenclature of volcanic -ocks, which were suggested by Li Zhaonai et al. (Institute of Geolo- gy, Chinese Academy of Geological Sciences, 1983)[4] and use foi China. The classifications and nomenclatures consist of three parts, namely th,e basic scheme (Table I )，applied to laboratory work;the simplified scheme (Table 2)， corresponding to the recommended scheme of the IUGS Subcommission on the Systematics of Igneous Rocks (R. Schmid, 1981)，applied to field work; the principles of nomenclature. The geological features of the various types of vol- canic rocks are systematically described in the Bulletin No. 7 of the Institute of Geology, Chinese Academy of Geological Sciences.