The　sintering　of　Pt　nanoparticles　is　one　of　the　main　reasons　for　catalyst　deactivation　during　the　high-temperature　propane　dehydrogenation　(PDH)　reaction.　Promoters　and　supports　have　been　introduced　to　prolong　the　catalyst　life.　however,　it　is　still　necessary　to　develop　novel　catalysts　with　robust　stability.　Herein,　the　phosphorus-modified　carbon　nanotube-supported　Pt　nanoparticles　were　employed　for　the　PDH　process.　Phosphorus　modification　improves　the　Pt　dispersion,　effectively　promoting　the　activity　of　Pt/P-CNTs.　Additionally,　the　phosphorus-modified　CNTs　can　interact　strongly　with　Pt　nanoparticles　by　improving　the　electron　transfer　or　hybridization,　stabilizing　Pt　nanoparticles　from　agglomeration,　and　significantly　enhancing　the　catalyst　stability.