Abstract: In response to the current difficulties, high investment, and limited number of equipment in teaching platforms for equipment manufacturing majors in universities, this article is based on digital twin technology and takes the development and design of an online welding machine experimental platform on the SFB platform as an example. It illustrates the development and design process of an online welding machine based on the SFB platform through overall design, digital twin body creation, debugging and verification, and provides some exploration for the in-depth research of digital twin technology in the field of equipment manufacturing.