Manufacturing method of flux-cored wire suitable for steel structure

The invention discloses a manufacturing method of a flux-cored wire suitable for a steel structure, and belongs to the technical field of flux-cored wire machining. The method comprises the following sequentially connected technological process steps: steel belt treatment, powder preparation, welding wire forming, welding wire finish drawing, layer winding packaging, vacuum sealing packaging and finished product obtaining. The medicine powder preparation process comprises the following steps: (1) raw material treatment: preparing main medicine powder and reinforcing powder, and storing in a shade place under nitrogen protection; (2) screening treatment: screening the main medicine powder and the reinforcing powder treated in the step (1) through a 2000-mesh sieve, and recovering screened materials; (3) drying treatment: performing 80 DEG C high-temperature treatment on the main medicine powder and the reinforcing powder treated in the step (2) to obtain dried main medicine powder and reinforcing powder; and (