Dingjiashan gold deposit is located in the north wing of Yuquanba synclinal slope, in Qingmu Chuan-Guankou ya thrust ductile shear zone and gold (copper) metallogenic belt. In this paper, the characteristics and stages of surrounding rock alteration of Dingjiashan gold deposit are analyzed and studied, and the relationship between it and gold mineralization is discussed, which is helpful to the further production and prospecting of gold deposits in the mining area, and also has great guiding significance for the prospecting of gold deposits in the region.