Background　and　Research　Purpose:　The　application　of　carbon　nanomaterials　(CNMs)　into　ultra-high-performance　concrete　(UHPC)　aligns　with　global　demands　for　intelligent,　sustainable　infrastructure　innovation.　This　review　systematically　examines　their　academic　significance　and　practical　implementation　through　multiscale　analysis.　Methodology:　A　bibliometric　analysis　identifies　key　research　trends　and　milestones.　The　study　systematically　examines　material　characteristics,　reaction　mechanisms,　and　mix　design　strategies　for　CNMs-enhanced　UHPC,　focusing　on　their　impact　on　mechanical,　durability,　and　functional　properties.　Key　Findings:　CNMs　significantly　improve　UHPC’　s　performances　through　microstructural　optimization　and　optimized　cement　hydration　kinetics.　Notably,　CNMs　exhibit　superior　multifunctionality　in　smart　sensing　applications　and　electromagnetic　shielding　efficiency　through　quantum　tunneling-mediated　electrical　percolation　networks.　Optimal　dispersion　and　dosage　are　critical　to　balancing　performance　enhancements　with　cost　and　scalability.　Future　Directions:　The　integration　of　CNMs　into　UHPC　represents　a　paradigm　shift　in　cementitious　material　design,　enabling　unprecedented　property　combinations　through　nanoscale　engineering.　Challenges　include　nanomaterial　dispersion　stability,　long-term　durability　validation,　economic　viability　constraints,　and　standardization　imperatives.　Frontier　research　directions　require　coordinated　efforts　in　the　following　dimensions:1)　Next-generation　dispersion　technologies;　2)　Development　of　cost-effective　manufacturing　routes;　3)　machine　learning-optimized　design;　4)　Multifunctional　hybrid　systems　to　bridge　laboratory　innovations　with　industrial　adoption;　5)　Cross-disciplinary　integration　of　smart　sensing　technologies.　©　2025　The　Korean　Society　of　Industrial　and　Engineering　Chemistry