Ultra-high　performance　concrete　(UHPC)　is　widely　used　in　the　field　of　reinforcement　due　to　its　high　tensile　strength,　compressive　strength　and　durability.　The　common　force　of　the　interface　between　old　and　new　materials　is　the　key　problem　to　be　solved　urgently　in　the　reinforced　structure.　Therefore,　aiming　at　the　problem　of　interface　properties　of　UHPC　reinforced　Normal　concrete　(NC)　composite　structure,　and　this　review　reviews　the　latest　progress　in　three　aspects　of　interface　mechanical　properties,　interface　microscopic　properties　and　interface　durability　of　UHPC　reinforced　NC.　Among　them,　the　mechanical　properties　of　the　interface　include　the　constrained　shrinkage　force　properties　and　the　interface　bonding　force　properties.　The　microstructure　properties　of　the　interface　include　the　microstructure　observation　test　method　and　the　microstructure　structure　model.　The　durability　of　the　interface　includes　the　carbonation　resistance　prediction　model,　freezing　resistance　and　impermeability.　In　addition,　based　on　the　existing　research,　this　paper　puts　forward　some　suggestions　on　strengthening　NC　with　UHPC.　©　The　Author(s)　2023.