In　this　paper,　the　author　used　mine　3D　software　to　establish　the　3D　geological　model　of　Sujishan　Graphite　deposit,　and　applied　geostatistics　to　estimate　the　resource,　offered　references　for　next　exploration　and　mining.　Surpac　was　used　to　set　up　geological　database　of　Sujishan　Graphite　deposit,　topographical　DTM,　ore　body　model　and　grade　model,　3D　of　drilling　database,　also　analysis　the　spatial　grade　distribution　in　reality.　Based　on　geostatistics,　drilling　samples　are　composited　and　statistically　analysed　and　eliminate　the　impact　of　outliers.　Experimental　variograms　were　constructed　for　the　striking,　dipping　and　vertical　directions.　Grade　and　resource　are　estimated　by　ordinary　kriging.　Comparing　to　the　traditional　estimation　methods,　this　3D　software　gives　reliable　estimation,　which　provides　references　for　dynamic　management　of　mine＇s　resource.　©　2018　Croatian　Academy　of　Sciences　and　Arts.　All　Rights　Reserved.