▎ 摘　　要

NOVELTY - The utility model relates to the technical field of processing cutter, especially relates to a composite step boring cutter. Technical solution thereof comprises: a tool post and a tool shank, a cutter head and a radiating assembly, one side of the cutter seat is equipped with a central seat, one side of the cutter seat far away from the central seat is equipped with a cutter handle, the outer side of the cutter seat is equipped with four groups of cutter head, one side of the cutter head is equipped with a blade, the inner part of the cutter head is equipped with a radiating component, the radiating component is equipped with a limiting plate, the inner part of the limiting plate is equipped with a copper pipe, one side of the copper pipe is provided with a graphene plate. The utility model is provided with a blade at one side of the cutter head, capable of increasing the contact area between the cutter head and the processing member through the blade, and can improve the processing effect of the cutter head, so that the cutter head is rotated, can enhance the cutting performance of the processing member, the lifting device for processing the efficiency of numerical control processing to the processing member. It increases the practicability of the device.