The orebodies of Daqiao gold deposit in West Qinling are characterized by their large-sized scale. In this paper, the 3D model of the ore deposit is used to objectively draw out the spatial structure of gold orebodies and their relation with geological structure of the deposit, and to extract ore-forming factors. The 3D modeling of geological structure of the ore deposit was carried out by using of the geological factors such as gold orebody, special lithology layer, structure and discontinuities, and the 3D models were analyzed. The results are as follows: The matching coefficient between granodiorite dyke and gold mineralization is higher in time than that in space. The marble and part of carbonaceous rocks were related to deep heat flows in the main hydrothermal ore period. The strike-slip faults cut in bevel the fold of bedding fault, of which the axial trace had deflected northward, and they made up a thrust-strike slip tectonic system togather. The main ore-controlling structures are bending of anticline, gently dipping bedding fault, and strike-slip fault. The early hydrothermal ore period of mineralization was controlled by bending of anticline and gently dipping bedding fault, and the main hydrothermal ore period of mineralization constrained by strike-slip fault. The key ore-prospecting indicators are characterized by the silicified rocks covering gold orebodies, and around which there distribute granodiorite dykes, quartz dykes, calcite dykes, calcitized breccia, marble, and carbonaceous rocks. By comprehensive analysis, the key ore factors of the super-large gold deposit, based on ore-forming conditions and ore-forming process in the hydrothermal ore period, can be stated as follows: Products of magmatic hydrothermal mineralization in thrust tectonic system in the early hydrothermal ore period, strike-slip tectonic system, deep magmatic fluid, and large scale of wallrock alternations around the silicified rocks.