The western Huangyangshan gold deposit, located in the middle of Karameili gold metallogenic belt, Eastern Junggar, is consisted of four gold ore bodies, all they are mineralized granite porphyry veins which are alkaline and K-rich. Three granite porphyry samples were collected, and CL characteristics of zircons from ore-bearing granite porphyry samples suggest their magmatic origin. LA-MC-ICP-MS U-Pb dating of zircons from the ore-bearing granite porphyry veins show that their emplacing ages are (318.4 ± 1.1)～(310.3 ± 2.6) Ma. Regional comparison indicates that there occurred two epoch of gold mineralization in Karameili area, the earlier was related to the alkaline magmatic activity and latter was associated with the ductile-brittle tectonic deformation.