This　study　presents　a　numerical　framework　for　evaluating　the　fatigue　damage　behavior　of　concrete　at　the　mesoscale.　An　equivalent　stochastic　mechanical　model　is　introduced,　accounting　for　inherent　heterogeneity　due　to　initial　defects.　The　model　is　further　enhanced　by　incorporating　viscosity　through　linear　damping　elements　within　each　element,　and　applying　reasonable　periodic　boundary　conditions.　A　practical　numerical　implementation　strategy　is　developed　within　the　framework　of　the　ABAQUS　finite　element　package　for　stress-controlled　fatigue　analysis,　which　incorporates　the　periodic　boundary　conditions.　A　series　of　fatigue　numerical　tests　are　performed　under　tensile　loading　conditions　on　representative　random　concrete　specimens　exhibiting　varying　degrees　of　heterogeneity.　The　results　indicate　that　mesoscopic　randomness　significantly　affects　the　progressive　development　of　fatigue　damage　and　ultimate　failure　patterns.　The　numerical　model　and　implementation　scheme　serve　as　valuable　tools　for　investigating　fatigue　mechanisms　of　concrete　materials　from　a　meso-mechanical　perspective.