PCD milling cutter and machine tool

The utility model provides a PCD milling cutter and a machine tool, the PCD milling cutter comprises a cutter head and a cutter handle, the cutter handle is provided with a cutter head mounting part, and the cutter head mounting part is provided with the cutter head; the tool bit is provided with a side face and a top face connected with the side face, the tool bit is provided with a first blade and a second blade which are arranged at intervals in the circumferential direction, the first blade and the second blade extend to the top face from the side face, and the blade length of the first blade extending to the top face is larger than that of the second blade extending to the top face. According to the milling cutter, the first cutting edge and the second cutting edge are arranged on the cutter head, the first cutting edge and the second cutting edge extend from the side face to the top face, and the cutting edge length, extending to the top face, of the first cutting edge is larger than the cutting edge le