Abstract: Taking the Hadamengou Gold Mine in Inner Mongolia as an example，the original geologi⁃ cal data are classified and sorted，and Surpac is used for 3D digital modeling to realize the digitization of mine resource information. Through the established solid model，four vein groups including 11 ore bodies are circled，the surface of the mining area is visually displayed by surface model，the occurrence state of gold grade in different vein groups is displayed in three-dimensional form by block model and grade model. The 3D digital model supports the next mining work.

Key words: 3D modeling, Surpac, gold mine