In　order　to　protect　Chinese　ancient　buildings,an　ancient　wooden　building　is　taken　as　an　example　to　study　its　progressive　collapse　under　vertical　transient　loads.By　LS-DYNA　program　simulation　model　of　the　ancient　building　is　built.Then　a　structure　member　is　considered　inactive　and　failure　loads　in　vertical　direction　are　applied　to　the　inactivation　point　to　make　the　structure　collapse.During　the　progressive　collapse　course　displacements　of　the　structure　at　different　time　are　obtained.Then　effects　of　inactivation　strain　of　wood　material　are　considered　and　response　curves　of　the　inactivation　point　under　different　inactivation　strain　values　are　obtained.Results　show　that　under　vertical　loads　the　ancient　building　may　collapse　because　of　buckling　caused　by　inactivation　of　one　of　its　members;On　the　other　hand　its　capability　of　progressive　collapse　resistance　can　be　improved　by　increasing　inactivation　strain　value　of　wood　material.　©　2010　IEEE.