In　this　paper,　a　modified　dual-evaporator　CO2　transcritical　refrigeration　cycle　with　two-stage　ejector　(MDRC)　is　proposed.　In　MDRC,　the　two-stage　ejector　are　employed　to　recover　the　expansion　work　from　cycle　throttling　processes　and　enhance　the　system　performance　and　obtain　dual-temperature　refrigeration　simultaneously.　The　effects　of　some　key　parameters　on　the　thermodynamic　performance　of　the　modified　cycle　are　theoretically　investigated　based　on　energetic　and　exergetic　analyses.　The　simulation　results　for　the　modified　cycle　show　that　two-stage　ejector　exhibits　more　effective　system　performance　improvement　than　the　single　ejector　in　CO2　dual-temperature　refrigeration　cycle,　and　the　improvements　of　the　maximum　system　COP　(coefficient　of　performance)　and　system　exergy　efficiency　could　reach　37.61%　and　31.9%　over　those　of　the　conventional　dual-evaporator　cycle　under　the　given　operating　conditions.　The　exergetic　analysis　for　each　component　at　optimum　discharge　pressure　indicates　that　the　gas　cooler,　compressor,　two-stage　ejector　and　expansion　valves　contribute　main　portion　to　the　total　system　exergy　destruction,　and　the　exergy　destruction　caused　by　the　two-stage　ejector　could　amount　to　16.91%　of　the　exergy　input.　The　performance　characteristics　of　the　proposed　cycle　show　its　promise　in　dual-evaporator　refrigeration　system.　(C)　2015　Elsevier　Ltd.　All　rights　reserved.