The disc cutter is only used for cutting the edges of the strip steel in the transverse cutting unit, and can perform longitudinal continuous cutting of narrow strip steel and wide strip steel in the longitudinal cutting unit. It can be used as both the raw material for longitudinal shearing of cold-rolled strip steel and the main equipment for longitudinal shearing and rewinding production lines of cold-rolled strip steel. Due to the high usage of disc shear blades, stable quality and long service life disc shear blades are important in production.