Experimental　and　numerical　investigations　were　conducted　on　skewed　plate-to-SHS　X-joints　under　compression.　In　order　to　research　static　behavior　of　skewed　plate-to-SHS　X-joints　under　compression,　a　total　of　ten　specimens　including　orthogonal　and　skewed　plate-to-SHS　X-joints　were　tested.　The　failure　modes,　compression-displacement　curves　and　strain　intensity　distribution　curves　of　joints　were　presented　in　the　paper.　The　effects　of　tau　(The　ratio　of　plate　thickness　to　SHS　chord　thickness)　and　theta　(skewed　angle　between　plate　and　SHS　chord　axis)　on　the　ultimate　bearing　capacity　and　ductility　of　X-joints　were　also　studied.　The　corresponding　finite　element　analysis　(FEA)　was　also　performed　and　calibrated　against　the　test　results.　Therefore,　an　extensive　parametric　study　was　carried　out　to　evaluate　the　effects　of　main　geometric　parameters　(tau　and　theta)　on　the　static　behavior　of　skewed　plate-to-SHS　X-joints　under　compression.　Results　of　these　tests　showed　that　as　value　of　theta　increased,　ultimate　bearing　capacity　of　X-joints　increased　irregularly.　As　value　of　tau　increased,　the　ultimate　bearing　capacity　of　X-joints　increased　significantly.　Maximum　strain　intensity　was　located　in　the　region　of　weld　seam　end　between　plate　and　SHS　chord.　As　value　of　theta　increased,　ductility　of　joints　with　thin　plates　increased;　ductility　of　joints　with　thick　plates　decreased.　Except　X-joints　with　theta=90　degrees,　coefficient　of　ductility　of　joints　with　thick　plates　were　larger　than　that　of　joints　with　thin　plates.　In　addition,　the　design　equations　were　proposed　for　skewed　plate-to-SHS　X-joints　under　compression,　which　were　shown　to　be　accurate　and　reliable.