The invention discloses a resin-insulation dry-type long-round-cake-shaped coil. The resin-insulation dry-type long-round-cake-shaped coil comprises end insulators, wires, an inner surface insulator, an outer surface insulator and line outlet terminals. According to the resin-insulation dry-type long-round-cake-shaped coil and a winding method, the use amount of an iron core of a transformer is reduced, the manufacturing cost is reduced by about 12%, and the no-load losses, the no-load current, the noise and the like of the transformer are optimized; due to a continuously-arranged coil structure, the wire filling coefficient is increased, the heat dissipation performance is good, the overloading capacity is higher, the electric field intensity in the coil is balanced, partial discharging is reduced, convenience is brought to pouring of epoxy resin, air holes, shrinkage porosity, cracks and the like are not prone to occurrence, the safety performance of the transformer is improved, and losses are reduced; as non-full-turn design is adopted for the portions, close to the ends, of the coil, the electric field intensity is optimized.