In　this　paper,　the　base　force　element　method　(BFEM)　for　dynamic　damage　problems　is　proposed.　And　the　BFEM　model　was　applied　to　investigate　the　dynamic　mechanical　behavior　of　recycled　aggregate　concrete　(RAC).　Any　convex　polygon　recycled　aggregate　was　simulated.　A　constitutive　relationship　of　dynamic　damage　was　given.　The　compression　test　under　dynamic　loadings　on　the　recycled　concrete　specimen　was　simulated.　The　stress-strain　softening　curve,　variation　law　of　dynamic　enhancement　coefficient　and　the　damage　pattern　were　researched　under　different　strain　rates.　The　dynamic　properties　of　recycled　concrete　materials　at　high　strain　rate　are　also　studied.　The　effect　of　different　aggregate　distribution　on　the　mechanical　properties　of　concrete　was　studied.　The　results　of　dynamic　calculation　of　recycled　concrete　materials　by　this　method　are　compared　with　the　experimental　results.　The　numerical　simulation　results　are　in　good　agreement　with　the　experimental　results.　The　comparative　analysis　on　the　dynamic　mechanical　properties　of　RAC　and　natural　aggregate　concrete　(NAC)　was　also　studied.　The　results　show　that　the　BFEM　can　be　used　to　analyze　the　dynamic　mechanical　properties　of　RAC　and　NAC　under　high　strain　rate,　and　can　be　used　for　large-scale　engineering　calculations.