Abstract: Described here in the paper are the status of the development and application of the edge milling machine in the production of HSAW pipe，and analyzed in details are the problems as staying with the application of currentlyused edge milling machine structure. And addressing such problems and the development direction of the edge-milling machine，the modification scheme is proposed，involving such aspects as the integral adjustment of the lower support roller of the machine，the split type contour follow-up combination mechanism，the gravity and flexible anti-splash combination etc.，providing useful ideas for the upgrading and modification of some home-made edge milling machines.