Bingdaban gold orebodies with high grade in Xinjiang is mainly located in the lower strain zone. By choosing typical cross section to compare the alteration country-rock, ore and granitoid protomylonite with their original rock-Neoproterozoic granitoids, mineralization features and commensal alteration can be rationaly explained. Compositional variation plays an important part in gold mineralization. Findings show that composition differentiates with different effect from original rock to tectonite in the process of shearing, including dynamic variation and hydrothermal variation, the interaction between dynamic variation and hydrothermal variation results in gold mineralization.