Abstract: With the development of Earth Science since the 21st century, the age of 3D has gradually come into the geosciences.The combination of mathematical geology and computer science has opened up a new cognitive space for the field of geoscience, and also brought new challenges and opportunities to geoscientists.Through 3D modeling and SURPAC software, 162 borehole data of No.Ⅰorebody of the Xiongcun Cu-Au deposit in Tibet were preprocessed and analyzed to interprete the orebody.According to the deep digital resource/reserve estimation of No.Ⅰorebody and the distribution of deep ore-forming elements in Xiongcun, the solid model and digital automatic resource/reserve estimation system were established by the method of geological statistics based on the drilling data.Based on the two-dimensional slice model of deep solid model, the spatial distribution and interrelationship of deep ore-forming elements were discussed.Research shows that the results of resource/reserve estimation by means of the inverse power of distance method are all greater than 96%, and effectively reveal the quantitative assessment of resources/reserves in the region.Under the guidance of ore body model and entity model and using the deep 2D fine slicing technology, the distribution characteristics and interrelationship of mineralization elements in the deep 3D space of the ore body are clearly displayed.That effectively reduces the ambiguity of single information of deep orebody and provides a reference basis for accurate deep prospecting.