The Luzhong vocanic rocks and subalkaline quartz syenite rockbelt whi ch consis ts of the Huangmeijian, Chengshan and Dalongshan batholiths are paragenetic a nd very similar in such characteristics as forming age, ge ology,mineralogy and petrology, petrochemistry, rare earth elements and trace el ements,isotopic compositions of Sr,Pb,Nd etc.,which shows that their origin ma y be alike. The magmas, which were related closely in genesis with the te ctonic activities in the depth, were derived from the mantle through partial me lting and contaminated by the crustal materials in the process of upwar d movement and emplacement along the deep faults.