A　novel　method　was　proposed　based　on　laser　line-scanning　sensor　to　obtain　point　clouds　of　turbine　blade.　Due　to　the　geometrical　invariability,　the　standard　sphere　was　used　as　measuring　basis.　The　surface　data　of　blades　were　measured　by　four-coordinate　measuring　machine　with　line-scanning　laser　sensor,　which　can　ensure　the　measuring　efficiency　of　blades　and　take　the　control　accuracy　of　the　measuring　machine　into　account.　Firstly,　the　point　cloud　data　of　the　turbine　blade　were　obtained.　Then　some　pre-processing　operations,　such　as　error　compensation,　de-noising　and　data　reduction,　were　performed　before　the　matching　operations.　Finally,　the　Non-Uniform　Rational　B-Splines　curve　fitting　algorithm　was　utilized　to　get　the　characteristic　curve　of　blade　surface.　The　experimental　results　indicated　that　the　method　can　effectively　improve　the　reconstruction　accuracy　of　the　blade　leading　and　trailing　edge　and　provide　more　accurate　raw　data　for　the　3D　modeling　of　the　blade.　©　2017,　Science　Press.　All　right　reserved.