In　order　to　improve　the　facility　utilization,　this　paper　has　analyzed　park　and　ride　behavior　under　multimode　choice　scenarios　from　the　view　of　decision　process.　The　analysis　is　based　on　the　decision　process　theory　and　used　computer　simulation.　By　the　analysis　of　one　preference　accumulative　process　of　decision　behavior,　it　is　shown　that　there　exist　the　tradeoff　and　comparison,　preference　reversal　for　multimode　choice　in　the　decision　process.　Then　the　effect　of　deliberation　threshold　and　initial　preference　on　park　and　ride　choice　behavior　is　discussed.　The　results　show　that　some　measures,　such　as　providing　park　and　ride　facilities　information　service　for　travelers,　reducing　car　dependence　through　a　free　transfer,　will　influence　the　decision　process　of　travelers　and　make　them　to　use　park　and　ride　facility.