A　new　design　method　for　at　plate　heat　pipe　thermal　spreader　is　put　forward.　A　at　heat　pipe　spreader　is　designed　and　manufactured　based　on　the　new　method.　The　new　design　of　the　heat　pipe　can　enhance　the　capillary　effect　and　reduce　the　thermal　conduction　resistance.　The　temperature　and　thermal　resistance　of　the　heat　pipe　are　obtained　under　different　heat　fluxes　and　the　influences　of　working　fluid　filling　are　studied.　The　experimental　results　proved　its　good　performance　for　temperature　levelling.