To　master　the　internal　damage　of　ancient　architecture　wood　members,　based　on　the　field　investigation,　the　damage　characteristics　and　damaged　parts　of　the　ancient　architecture　wood　members　were　analyzed.　By　taking　the　reverse　test　of　elm　specimen　by　the　FAKOPP　stress　wave,　the　stress　wave　under　different　empty　size,　hollow　shape　and　wave　velocity　attenuation　of　digital　collection　were　studied.　Results　show　that　the　hole　constantly　expands,　the　error　value　constantly　decreases　between　test　area　and　actual　area.　And　the　minimum　error　is　4%.　In　addition,　there　is　significant　linear　relationship　between　T　and　S.　FAKOPP　stress　wave　on　hole　shape　recognition　is　weak.　By　using　the　systematic　thinking　a　comprehensive　analysis　of　two-dimensional　plane　detection　figure　was　conducted,　and　the　Va,　Vb,　Vc,　Vd　and　Ve　wave　velocity　line　diagram　was　reflected.　The　research　provides　reference　for　determining　the　shape　of　inner　the　hole　area　and　hole　shape,　and　the　most　stable　path　of　wave　velocity　is　Ve.　When　the　empty　hole　was　half　of　the　cross　section　area,　the　attenuation　of　wave　velocity　of　complete　specimen　comparatively　reached　51.16%.　The　research　results　are　useful　to　the　preventive　protection　of　ancient　buildings,　and　can　provide　effective　data　support　for　practical　engineering　repair　and　reinforcement　of　buildings　because　the　research　adopted　the　detective　method　of　quantitative　analysis　instead　of　qualitative　analysis.　©　2016,　Beijing　University　of　Technology.　All　right　reserved.