The utility model provides a double-blade type cut-off knife. The double-blade type cut-off knife is in a sheet shape; at least one cutting edge is formed at the end of the double-blade type cut-off knife. The double-blade type cut-off knife is characterized in that each cutting edge is in a V shape defined by connecting two edge faces. The problem that a traditional cut-off knife is poor in good rate when cutting remaining materials of the ends and corners of objects is solved.