Firstly,　on　the　basis　of　wheel-track　interaction　theory,　a　function　of　exciting　force　of　moving　train　on　elevated　line　is　established.　Then,　the　exciting　force　is　acted　on　the　three-dimensional　numerical　models　of　rail　structure,　elevated　line　and　soil　foundation　by　utilizing　the　finite　element　software.　The　surrounding　environment　vibration　response　caused　by　train　operation　is　simulated;　and　the　numerical　results　are　compared　and　verified　by　the　field　measurement　data.　Furthermore,　the　parameter　effects　of　length　of　bridge　span,　train　speed　and　soil　properties　on　environment　vibration　are　studied.　On　the　basis　of　investigation　of　parameter　influence　characters　and　according　to　the　statistical　analysis,　a　prediction　formula　of　vibration　level　on　ground　induced　by　urban　rail　transit　with　elevated　line　is　presented　and　validated　by　the　field　experiments.　The　research　results　show　that　the　numerical　simulation　and　prediction　can　truly　reflect　the　actual　environment　vibration　caused　by　urban　rail　transit　with　elevated　line.