The　paper　reflects　the　deeper　problem　in　Tourism　Supply　Chain　which　is　trust　among　travel　agencies,　and　between　travel　agencies　and　affiliated　enterprises　according　to　the　phenomenon　of　the　lack　of　trust　between　travel　agencies　and　tourists.　Firstly,　the　concept　of　trust　is　introduced.　The　study　shows　that　it　is　necessary　to　enhance　the　cooperative　trust　in　Tourism　Supply　Chain　dominated　by　a　travel　agency　based　on　the　connotation　of　trust　and　the　characteristics　of　Tourism　Supply　Chain.　Then　influential　factors　of　trust　among　members　in　Tourism　Supply　Chain　are　analyzed　through　building　game　models.　Finally,　on　the　basis　of　above　research,　this　paper　studies　the　trust　mechanism　in　Tourism　Supply　Chain.