This　paper　introduces　the　development　of　a　tool　for　modeling　and　analysis　of　BTF　toolholder-spindle　system,　based　on　ANSYS　software.　The　tool　is　developed　in　parametric　design　method.　Most　parameters　are　defined　automatically　except　a　few　parameters　requiring　users　to　input,　which　improves　the　modeling　efficiency　greatly.　The　interface　joint　of　the　BTF　toolholder-spindle　is　established　by　adopting　spring-damping　model　and　defined　by　custom　element　unit　Matrix27.　The　proposed　model　reflects　the　characters　of　the　joint　on　the　properties　of　BTF　toolholder-spindle　effectively.　A　case　study　is　given　to　verify　the　efficiency　and　accuracy　of　the　developed　tool.