The invention relates to a device for machining a contact material, in particular to a device for the angle chamfering, the arc chamfering and the chip removing at a straight flute after the straight flute is machined on the contact material. When the device is in use, a workpiece is arranged on fixed clamping apparatus for the angle chamfering, and then another flute replaces the machined flute on the clamping apparatus for the angle chamfering, thereby the time for a disk to rotate is saved. The device has reasonable structure, convenient operation, energy saving, high production efficiency and good product quality. The device mainly comprises the elements of a base 6, a support pillar 15, two electric motors 18, an interlinking rod 19, a travelling table 13, three handles 2, a clamp 9, a suction blower 17, and the like.