The invention belongs to the technical field of electric heating wire processing devices, and particularly relates to an automatic forming machine for a round heating wire. The automatic forming machine comprises a tool frame, a shaping mechanism, a wire arranging mechanism, a wire feeding mechanism and a clamping mechanism; the shaping mechanism comprises a first toothed die and a second tootheddie, wherein the first toothed die is fixed on the upper end surface of the tool frame, the second toothed die is connected to the upper end face of the tool frame in a sliding mode, the first tootheddie and the second toothed die are in meshed fit, a sliding rail is fixedly connected to a U-shaped mounting frame, a servo motor is arranged on the left side of the sliding rail, the servo motor iscoaxially connected with a screw rod, and the sliding rail is connected with a sliding block through a screw rod in a sliding mode. The shaping mechanism, the wire arranging mechanism, the wire feeding mechanism, the clamping mechanism and a wire taking mechanism are arranged, so that the characteristics of programmable control, automatic wire arranging and winding and automatic setting are achieved; the automatic forming machine is convenient to use, high in machining precision, capable of improving the production quality of products and high in automation degree, reduces the production cost,achieves the safety and reliability, and reduces the fatigue degree of workers.