Since　recycled　aggregate　concrete　(RAC)　is　valuable　for　green　concrete　and　global　sustainability,　it　has　attracted　many　numerical　research　studies　as　a　five-phase　material　in　mesolevel.　In　this　study,　the　digital　image　processing　(DIP)　technique　is　used　to　obtain　the　real　aggregate　and　mortar　distribution　of　recycled　concrete　specimens.　By　applying　the　DIP　MATLAB　model,　the　real　mesoheterogeneity　of　RAC　is　well　represented.　Based　on　the　base　force　element　method　(BFEM),　a　mesomechanical　model　is　constructed　to　simulate　the　uniaxial　tension　and　compression　tests　of　recycled　concrete　specimens　subjected　to　displacement　loads.　The　damage　and　the　cracking　mechanisms　of　RAC　are　analyzed　in　the　mesolevel.　Moreover,　the　failure　process　and　the　failure　mode　are　investigated.　Results　indicate　the　nonlinearity　deformation,　stress　redistribution,　and　cracks　propagation　of　RAC.　The　stress-strain　curve,　fracture　energy,　and　fracture　distribution　are　also　figured.　The　comparative　analysis　between　the　simulation　and　the　experimental　results　of　in　situ　RAC　samples　shows　the　applicability　of　the　model;　therefore,　the　failure　mechanism　is　revealed.　It　also　extends　the　application　of　the　BFEM　in　the　field　of　failure　mechanism　analysis　of　RAC　as　a　heterogeneous　composite　material.