The invention discloses a production method of a single-coating enamelled wire, which includes the following steps: 1 drawing: a copper bar is led to be drawn on drawing equipment to be a bare copper wire with the size required by a user; 2 annealing: the bare copper wire which has been drawn is annealed in an enamelling machine, the annealing comprises first-section annealing and second-section annealing, velocity is 260-270 m/min, curing temperature is 560-580 DEG C, the first-section annealing temperature is 480-500 DEG C, the second-section annealing temperature is 460-480 DEG C, circulation wind speed is 3,800-4,000rpm, and waste discharge wind speed is 1,800-2,000rpm; and 3 painting: 220-level polyamide-imide (PAI) wire enamel is adopted for painting, painting passes: 14-24, and the thickness of the insulated paint layer coated for each pass is 0.003-0.004MM. When the method is used, due to the fact that the method adopts the thin-paint multi-painting mode, each pass of paint is led to be even in thickness, baking is most sufficient, the defect of a single coating is overcome, and excellent paint film adhesion is achieved.