Abstract: The Dashuigou tellurium deposit of Shmian county, Sichuan province is a new type deposit.The tellurium (gold) in the deposit can be devided into pyrite-pyrrotite stage, tetradymite stage, and chalcopyrite-pyrite stage. Although volcanic mafic rock is the country rock for the mineralizations, the alterations and their zonings around the ore veins are charac-terized by extensive developments of biotite, muscovite, quartz, and feldspar, Measurement of pyrrotite in pyritepyrrotite stage and tetradymite of tetradymite stage show that δ³⁴S=-1.7‰-2.8‰。Measurement of dolomite and calcite show thaty δ¹³C_PDB=-5.3‰——7.42‰。and δ¹⁸O_SMOW=10.9‰-13.1‰, The alterations characterized by enrichments in silicon, alkli, and volatile components in accordance with the data of S.O. C isotopes accordantly prove that the hydrothermal solution associated with the Dashuigou tellurium deposit is derived from the depth and probably related to the emplacement of the sarnait stock which is located 12 km north to the Dashuigou deposit.