In　order　to　improve　surface　roughness　and　hydrophilicity　of　microchannels　in　microfluidic　chip,　then　to　achieve　high　fluid　speed　under　small　pressure,　a　technology　named　as　coating　solidifiable　adhesive　film　is　proposed.　In　this　paper　the　microfluidic　chip　is　manufactured　using　CO2　laser.　The　film　is　coated　on　inside　wall　of　microchannels　using　ultraviolet　optic　solidifiable　adhesive.　Two　coating　methods　were　used　to　synthesise　the　NOA61　film.　The　surface　roughness　and　waterphase　contact　angle　of　the　microchannel　with　and　without　the　NOA61　film　are　measured.　The　roughness　is　reduced　from　2　mu　m　to　243.36　nm　and　the　contact　angle　is　reduced　from　100　to　72.55　degrees,　when　NOA61　film　is　coated　with　the　action　of　gas　blowing　and　consequent　drying　by　UV　light.　The　roughness　is　reduced　from　2　mu　m　to　60.49　nm　and　the　contact　angle　is　reduced　from　100　to　55.35　degrees,　when　NOA61　film　is　obtained　by　gravity　flow.