Although　spatial　lattice　structure　is　consisted　of　numerous　tubes　in　general,　those　tubes　always　are　combined　in　certain　knowable　rules.　A　three-ste　Pstrategy　for　damage　location　of　spatial　lattice　structure　is　proposed.　To　verify　the　feasibility　of　the　proposed　method,　a　test　model　of　single-layer　cylindrical　reticulated　shell　with　157　bolt-ball　joints　and　414　tubes　were　assembled.　The　vibration　characteristics　of　this　test　model　both　in　good　condition　and　in　five　damage　cases　were　measured.　Different　tubes　were　removed　in　the　five　damage　cases　and　a　fine　finite　element　model　was　built.　With　the　first　three　measured　modal　data　from　a　part　of　measuring　points　on　this　test　model　as　input　parameters　of　the　neural　network　model,　different　damage　of　the　model　is　identified.　Based　on　the　measured　low-order　incomplete　modal　parameters,　this　strategy　can　simplify　the　neural　network　and　its　identification　effect　is　also　good,　which　validates　the　feasibility　of　the　proposed　method.