In　China,　the　timber　structure　is　the　most　important　architectural　form　of　ancient　buildings,　but　in　the　renovation　of　ancient　buildings,　old　timber　components　were　often　substituted　for　new　components　without　enough　damaged　detection　and　evaluation.　This　causes　the　loss　of　lots　of　historical　information　and　authenticity　of　cultural　relics.　In　this　paper,　we　try　toit　is　tried　to　establish　the　correlation　between　non-destructive　testing　and　mechanical　properties　of　ancients’　timber　components,　and　trough　the　scientific　non-destructive　testing　and　assessment,　we　can　remain　ancients’　timber　components　as　far　as　possible.　©　2018　Indian　Pulp　and　Paper　Technical　Association.　All　rights　reserved.