The invention relates to an adjustable varnished flat wire varnishing mold, which comprises a first base, a first locking screw, a first die handle, a first positioning pin, a second base, a second locking screw, a second die handle, a second positioning pin, a third base, a third locking screw, a third die handle, a third positioning pin, a fourth base, a fourth locking screw, a fourth die handle, a fourth positioning pin and an elastic clamp. The adjustable varnished flat wire varnishing mold can adjust the positioning pins online to meet the requirements of different sizes according to thesize of a wire and different thicknesses of insulation varnish films, does not require to cut off the wire to replace the varnishing mold, makes the thickness of the insulation varnish film meet the process design requirements by precisely adjusting the positioning pins, and finally meets the requirements to improve production efficiency and varnishing quality.