Grouting　is　a　primary　method　for　improving　the　permeability　of　fractured　rock　masses　and　ensuring　the　safe　operation　of　hydro　projects.　However,　issues,　such　as　ineffective　grouting　and　unsatisfactory　post-grouting　seepage　control,　can　occur　in　grouting　projects.　A　geological　model　dedicated　to　grouting　is　an　effective　means　to　solve　the　problems　mentioned　above.　This　study　proposes　a　Grouting　Geological　Model　(GGM)　specifically　designed　for　grouting　engineering,　aiming　to　understand　better　and　predict　the　grouting　material　and　pressure　of　fractured　rock　masses.　The　GGM　is　first　defined　in　this　study,　which　mainly　consists　of　grouting-related　information　and　encompasses　grouting-related　analysis　methods　and　grouting-related　models.　The　characterizations　of　GGM　include　geological　conditions　(such　as　overlying　layers,　rock　layers,　faults,　weak　interlayers,　joints,　and　karst　caves),　environmental　situations　(such　as　in　situ　stress,　strength,　and　permeability),　and　grouting　engineering　contents　(such　as　grouting　material　and　pressure).　A　comprehensive　modeling　scheme　suitable　for　the　GGM　is　proposed,　the　main　innovative　work　includes:　(1)　an　extrapolation　modeling　method　for　geological　model-related　grouting;　(2)　a　deterministic-random　modeling　method　for　parameter　model-related　grouting;　(3)　a　grid　volumes　modeling　method　representing　grouting　material　and　pressure.　The　spatial　distribution　of　grouting　material　and　pressure　can　be　analyzed　by　GGM　through　the　comprehensive　modeling　scheme.　Relying　on　the　Dongzhuang　hydro　project,　the　geological　model-related　grouting,　parameter　model-related　grouting,　and　grouting　material　and　pressure　model　of　the　grouting　test　area　were　established　using　the　modeling　scheme　of　GGM.　The　results　of　the　material　and　pressure　are　consistent　with　the　field　test　data,　which　reveals　that　the　GGM　can　be　applied　to　determine　the　materials　and　pressures　in　the　grouting　project.