In　the　processes　of　energy　conversion　and　utilization　of　ship　power　systems,　the　realization　of　the　maximum　efficiency　recovery　of　flue　gas　waste　heat　was　an　effective　way　to　reduce　the　EEDI　of　the　ships.　sCO2　power　generation　system　had　the　technical　advantages　of　the　ship＇s　waste　heat　recycling,　which　caused　the　global　shipbuilding　industry＇s　attention.　How　to　organically　integrate　sCO2　power　generation　system　with　the　ship＇s　power　system　to　achieve　high-efficiency　and　stable　combined-cycle　operation　of　power　generation　was　the　bottleneck　that　currently　restricted　the　applications　of　the　above-mentioned　new　technology　on-board　ships.　The　basic　principles,　typical　technical　features　and　cyclic　structure　of　the　sCO2　Brayton　cycle　power　generation　technology　were　outlined,　and　the　research　status　of　the　sCO2　power　generation　system　for　the　waste　heat　recycling　of　ships　at　home　and　abroad　was　analyzed　herein.　The　key　technical　problems　existing　in　the　engineering　applications　of　waste　heat　power　generation　for　shipbuilding　at　the　present　stage　were　discussed,　which　may　provide　a　theoretical　reference　for　the　promotion　of　basic　theoretical　research　and　engineering　design　of　sCO2　Brayton　cycle　power　generation　technology　in　the　field　of　waste　heat　recovery　and　utilization　of　ship　flue　gas.　©　2019,　China　Mechanical　Engineering　Magazine　Office.　All　right　reserved.