The　post　earthquake　collapse　is　one　of　the　important　causes　of　the　mountain　town　houses　damaged　and　traffic　congestion,　it　has　important　significance　to　carry　on　the　scientific　and　reasonable　assessment　to　take　preventive　measures　accordingly.　Aiming　at　the　complexity　of　post　earthquake　collapse　formation　mechanism　and　the　uncertainty　of　evaluation　index,　according　to　evidence　theory　and　fuzzy　set　theory,　a　risk　assessment　method　of　collapse　disaster　can　be　taken　into　account　interaction　of　multiple　indicator　has　been　proposed.　In　this　method,　the　element　of　evidence　space　is　firstly　considered　as　fuzzy　sets.　Through　the　fuzzy　probability　to　describe　expert　advice,　which　has　combined　with　expert　advice　to　get　fuzzy　sets　to　determine　the　probability　distribution　function.　Then　by　the　synthesis　rules　of　evidence　theory　function,　the　trust　degree　function　of　post　earthquake　collapse　risk　can　be　obtained,　thus　the　collation　based　on　the　risk　levels　of　classification　has　been　established.　Finally,　examples　were　provided　to　validate　and　prove　its　scientific　and　reasonable,　which　has　provide　a　new　way　for　post　earthquake　collapse　risk　evaluation.　©　2015　ejge.