The ring rolling machine can produce continuous local deformation of ring forgings, and then realize the processing technology of reducing wall thickness, expanding diameter, and forming cross-section contours. The ring rolling machine is suitable for producing annular mechanical parts of various shapes and sizes, such as bearing rings, ring gears, flanges, wheel hubs, thin-walled cylindrical parts, wind power flanges, high-diameter flanges, and other seamless annular forgings.