Abstract: The Sandaowanzi gold deposit, located in the southeast of the Yanshannian Daxinganling metallogenic belt, is of mesothermal-epithermal volcanogenic type. The type of ore is quartz vein with poor sulfide. By the study on the characteristics of geological background, mineralization characteristics, types of ore and wallrock alteration of the deposit, the ore-controlling factors and metallogenic conditions are summed up. It is significant in the prospecting for the same type of deposits in the ore belt and nearby areas.