The　laser　remolten　layer　was　made　on　the　Inconel　690　alloy　tubes　by　using　electroplated　chromium　and　laser　irradiation.　Through　the　scanning　electron　microscope　(SEM)　and　energy　dispersive　X-Ray　spectroscopy　(EDX),　the　microstructure　of　the　electroplated　coating　and　the　laser　remolten　layer　was　investigated,　as　well　as　the　diffusion　behavior　of　chromium　in　the　layer.　The　results　show　that　in　the　thin　laser　remolten　layer,　from　the　outer　surface　to　the　interior　of　the　tube,　the　chromium　concentration　gradient　is　larger,　and　the　concentration　reduces　gradually.　With　the　laser　remolten　layer　depth　increases,　the　diffusion　depth　of　chromium　increases　and　element　distribution　trends　uniform.