In　many　places,　the　concrete　structures　suffered　from　impacted-damage　need　to　be　repaired.　Herein,　a　3-D　numerical　meso-scale　model　was　established　to　study　the　mechanical　behavior　of　the　CFRP　strengthened　impact-damaged　RC　beams　under　4-point　loading.　The　strain　rate　effect　of　the　strength　of　both　of　the　concrete　and　the　steel　bars　and　the　Young＇s　modulus　of　the　concrete　were　taken　into　account　during　the　impact　process.　In　the　next　strengthening　process,　the　anisotropic　behavior　of　the　CFRP　was　considered　as　well.　Furthermore,　the　bond-slip　behavior　of　the　longitudinal　bars　was　simulated　in　this　model.　The　effectivity　of　the　numerical　model　in　simulating　the　impact　behavior　of　concrete　members　and　the　behavior　of　FRP　strengthened　damaged　RC　beam　was　validated　against　experiments.　Four　types　of　strengthening　schemes　were　designed　and　then　compared　in　terms　of　the　failure　mode,　failure　process,　strain　distribution,　and　three　mechanical　indexes.　It　is　found　that　the　approach　that　strengthening　the　damaged　beam　only　with　the　bottom　FRP　sheet　should　be　avoid　in　practice　because　of　the　shear　failure　of　the　concrete　in　the　shear　span.　Interestingly,　though　the　loading　capacity　of　the　damaged　beam　gets　the　most　significant　increase　by　the　strengthening　with　the　U-shaped　sheet,　the　scheme　is　not　suggested　due　to　its　inferior　ductility　resulting　from　the　failure　on　the　FRP　at　the　bending-shear　section.　Furthermore,　the　influence　of　the　number　of　the　strengthening　layer　on　the　mechanical　performance　of　the　damaged　beams　was　discussed　as　well.　It　is　found　that　the　bearing　capacity　is　enhanced　with　the　increase　of　the　strengthening　layer　while　the　ductility　and　the　energy　dissipation　of　the　specimen　decrease　at　the　same　time.　In　present　work,　four　layers　of　bottom　sheet　plus　average　spaced　U-strips　in　shear　span　is　recommended　to　strengthen　the　impacted　damaged　RC　beams.