In this work the influence of the Ca addition to PtSn/ZSM-5 catalyst on its performance for propane dehydrogenation was investigated. The catalysts were characterized by X-ray diffraction, BET analysis, TEM, NH3-TPD, TPO and TG. Results showed that the addition of calcium could not only modify the characteristics and properties of both acid and metal function but also suppress coke deposits on the catalyst. The addition of 0.9 wt% Ca to PtSn/ZSM-5 prompted catalytic activity. However, the incorporation of excessive Ca resulted in catalyst deactivation. TPR results implied that excessive Ca promoted the reduction of oxidized tin species to Sn-0. The Sn-0 probably could interact with Pt to produce a PtSn alloy which led to the diminution of catalytic activity.