The utility model provides a high-voltage winding of a dry-type transformer. The high-voltage winding of the dry-type transformer comprises gridding cloth of an inner barrel of an inner layer of a coil and a winding body; the winding body is wound by enameled wires or non-woven fabric covered wires and fiber-glass covered wires along the gridding cloth of the inner barrel; in order to guarantee electrical insulation of sections of the winding body, two ends of each section of the winding body are trapezoidal; the number of turns of wires of each layer of the winding body is gradually increased or decreased from an inner layer to an outer layer to form the trapezoidal ends; a plurality of layers of supporting gridding cloth are wound on a rectangular section in the middle of the winding body at intervals; a layer of gridding cloth is wound on the outer layer of the winding body; the thickness of a portion, which is wound with the supporting gridding cloth, in the middle of the high-voltage winding is equal to that of the tail end of the middle rectangular section of the winding body; two adjacent planar coils are supported; distances among the sections of the winding body are guaranteed; and the circumstance that the wires on the upper layer collapse and insulation distances are insufficient in a vacuumized resin casting process is avoided.