Utilizing　the　confinement　effect　of　zeolite　pores　to　stabilize　active　sites　has　been　developed　for　the　improvement　of　catalytic　stability　and　performance.　Herein,　a　facile　strategy　is　proposed　to　synthesize　a　Sn　stabilizing　dispersed　Pt　delta+　sites　confined　in　zeolite　pore　catalyst　via　Ar　calcination　for　propane　dehydrogenation　(PDH).　0.2Pt/0.5Sn-S-1-Ar　shows　excellent　propylene　formation　rate　of　10.0　mol　C3H6　center　dot　g(Pt)(-1)center　dot　h(-1)　and　propylene　selectivity　higher　than　99.5%　at　450　degrees　C,　and　the　superior　catalyst　stability　in　200　h　on-stream.　And　it　has　the　lowest　apparent　activation　energy　barrier　of　18.45　KJ/mol　over　Pt-based　catalyst　for　PDH　to　our　knowledge.　According　to　systemic　characterizations,　it　is　demonstrated　that　the　implantation　of　Sn　into　Silicalite-1　framework　before　introducing　Pt　is　essential　to　generate　the　highly　dispersed　Pt　delta+　species　confined　in　zeolite　pore,　and　the　Pt　delta+　species　confined　in　zeolite　pore　with　stronger　propane　adsorption　and　propylene　desorption　ability　is　responsible　for　superior　PDH　performance.