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The La-ZSM-5 zeolite with different contents of La was synthesized by the hydrothermal method.The physico-chemical properties of the materials were studied.The results of FT-IR analyses indicated that La might be incorporated into the framework of ZSM-5 zeolite.The NH3-TPD analyses showed that the amount of weak acid sites of the zeolite decreased with a continuously increasing La content.Afterwards,the La-ZSM-5 zeolite was used as the support of PtSnNa catalyst for propane dehydrogenation.The test results revealed that the utilization of LaZSM-5 zeolite could achieve a high propene conversion,and effectively inhibit the coke formation on the catalyst surface.When the content of La was 0.16%,the catalytic activity and stability of the catalyst got the best of its performance.Besides,the PtSnNa/La(0.16%)-ZSM-5 catalyst is more stable than the conventional PtSnNaLa/ZSM-5 catalysts.