The　deactivation　of　Pt-based　catalysts　is　the　most　critical　problem　in　nonoxidative　propane　dehydrogenation　reaction　(PDH),　usually　manifested　in　carbon　deposition　and　active　site　sintering.　Zn,　as　another　cheap　metal　with　more　abundant　reserves　than　Sn,　is　also　widely　used　as　an　assistant　in　Pt-based　catalysts.　However,　both　of　them　are　easy　to　be　reduced　to　metal　valence　state　and　lost　in　the　reaction　process.　Herein,　the　enlarged　quantities　of　Zn　are　applied　in　the　bimetallic　Pt-Zn　catalyst　preparation.　As　confirmed　by　the　increased　reduction　temperature　of　oxidized　Zn　species,　it　effectively　minimizes　the　influence　of　the　active　metal　mobility　caused　by　Zn　loss.　At　the　same　time,　the　constructed　bimetallic　structure　modulates　the　surface　acidity　of　Zn　species　and　presents　benign　propylene　desorption　ability,　thus　the　formed　highly　dispersed　Pt　sites　on　the　surface　of　Pt1Zn1　alloy　are　well-matched　with　its　high　propylene　selectivity　(similar　to　98.6%).　In　addition,　the　rich-ZnPt(1)Zn(1)sites　are　beneficial　for　enhancing　the　capability　of　resisting-coke,　thus　retarding　the　deactivation　of　this　catalyst.