It　is　very　necessary　that　Implement　information　monitoring　and　dynamic　construction　because　of　Complex　geological　environment　and　lack　of　basic　information　in　the　process　of　tunnel　construction.　The　monitoring　results　show　that　3　d　laser　scanning　technology　and　information　management　system　has　important　theoretical　significance　and　application　value　to　ensure　the　safety　of　tunnel　construction,　rich　construction　theory　and　technology.　It　can　be　known　in　real　time　the　deformation　information　and　the　construction　information　in　near　tunnel　workplace　and　the　whole　tunnel　section　in　real　time.　In　the　meantime,　it　can　be　known　the　deformation　regularity　in　the　tunnel　excavation　process　and　the　early　warning　and　forecasting　in　the　form　of　graphic　and　data.　In　order　to　determine　the　reasonable　time　and　provide　basis　for　supporting　parameters　and　lining