The invention relates to the technical field of electric welding machines, in particular to a digitized inverter welding machine which comprises a preceding public power supply circuit, an auxiliary power supply circuit, a main control circuit, a welding machine control circuit, a wire feeder control circuit and a wire feeder motor connected with the wire feeder control circuit. Current is divided into three paths after passing through the preceding public power supply circuit, and the three paths of current respectively enter the wire feeder control circuit, the welding machine control circuit and the auxiliary power supply circuit. According to the digitized inverter welding machine, the wire feeder control circuit is connected with the preceding public power supply circuit, so that the wire feeder control circuit and the welding machine control circuit use one and the same power supply, an additional power supply is not needed to be arranged, and meanwhile the input voltage of the wire feeder control circuit is lowered, so that an insulated isolation part is not needed to be additionally arranged in the wire feeder control circuit, the whole size and mass are lowered, production and selling costs are reduced, and daily production operation is facilitated.