Xi'nanwang gold deposit located in Penglai-Qixia gold metallogenic belt. It is a typical gently inclined and lamellate quartz-vein type gold deposit. Most of the ore bodies are controlled by fractures with the trend of NE—NNE. Its tend is SE with the inclination angle of 15°～25°. It appears in thin veins and distributes in biotite-bearing monzonitic granite of Luojia unit in Guolialing sequence, and gneissic fine-grained trondhjemite of Mojia unit in Tangezhuang sequence. In this paper, based on the study of geological charateristics and occurrence regularity of ore bodies, it is regarded that there is a good prospecting potentiality in deep part and surrounding areas of this deposit.