The invention relates to a manufacturing process of a stator bar of a turbo generator: thermoforming is conducted to a wire; an insulation layer is trimmed off from the center to two ends of the small surface of a conductor; bare copper is exposed; the stator bar consists of an upper bar and a lower bar; an exposed copper point is trimmed at 88mm interval from point A to point B on the upper bar; an exposed copper point is trimmed at 176mm interval from point C to point D on the upper bar; an exposed copper point is trimmed at 102.7mm interval from point E to point F on the lower bar; an exposed copper point is trimmed at 205.4mm interval from point G to point H on the lower bar; the length of an equipotential layer is 9210mm, within which a layer of conducting paint is evenly coated and alow-resistance anti-corona belt is wound parallelly; and the equipotential layer is finished. The 1000MW and 27kV-rated voltage turbo generator stator bar manufactured by the process has particular electric field distribution characteristics and insulating property in that the insulation thickness is 6.2mm, the breakdown voltage of the bar reaches 6 times of the rated voltage, the breakdown fieldstrength reaches 27.4kV/mm and the service life under the voltage of 2.0Un reaches 469h, which reaches advanced world level.