The authors conducted mapping in the mining area on the basis of detailed field geology and, in combination with the previous research results, fully analyzed gold ore-controlling structures and genesis of the Daleishan deposit. It is held that the ore-guiding and matching structures of the gold deposit belongs to a new type, and both structures are not fault, but belong to the formation of shear zone formed by upward migration of the Daleishan granite dome caused by magmatic activity during the Yanshanian epoch, which provided the channel for late ore-guiding structure and matching structure; Neoproterozoic gneissic monzogranite provided the gold with higher gold element background values for the gold deposit, and magmatic activities not only caused the activation migration of gold element but also provided the gold metallogenic material source. The gold ore deposit was a post-magma low temperature magmatic hydrothermal deposit. According to the geological feature that the gold quartz vein fills in the crack of lamprophyre, the authors used LA-ICP MS zircon U-Pb dating and obtained a lamprophyre diagenetic age of 126.8±2.0 Ma, which confined the mineralization age of the Daleishan gold deposit.