Special last-stage vane for large-scale 60Hz turbine

The utility model relates to a turbine vane, in particular to a special last-stage vane for a large-scale 60Hz turbine, solving the problems of unstable quality, low efficiency and influences the safety running of the turbine of the traditional last-stage vane. A shroud, a vane working part and a vane root of the utility model are stamped into a whole from top to bottom, a boss tiepiece is positioned in the middle of the vane working part and is made into a whole with the vane working part, the molded line of the vane working part is a variable-section twisted vane, the sectional area of the vane working part from root to top is gradually reduced, the height of the vane working part is 858 mm, and the axial width of the root of the vane working part is 199.47 mm; and the vane root is a helical tooth and vertical tree-shaped vane root, the axial width of the vane root is 260 mm, the thickness of the shroud is 20 mm, and the axial distance of the working faces of the shroud is 33.42 mm. The special last-stage vane can be used as the last-stage vane for subcritical and supercritical 60 Hz turbines with the power changing range of 300 MW-600 MW.