Abstract: The equidistant profiles are more and more widely used in connection structures. Because the section profile curve of the equidistant profile is special, it is generally processed by copying turning and CNC turning. The equidistant profile machining by orthogonal turning milling is proposed. The UG processing module and the post processor are applied for generating program of machining the equidistant profile by orthogonal turning milling. The virtual horizontal turning milling machining center is established, and it is emulated to machining the equidistant profile by orthogonal turning milling by VERICUT, and the processing results were compared and analyzed.The results show that the equidistant profile can be machined by orthogonal turning milling better.