Cylinder digging cutter

The invention discloses a cylinder digging cutter which comprises a cutter handle, a transverse rod, a vertical rod and a cutter head, the cutter handle is used for being installed on a main shaft of a machine tool, the transverse rod is horizontally arranged on the cutter handle in a sliding adjustment mode, the vertical rod is arranged at one end of the transverse rod in a sliding adjustment mode, and the extending direction of the vertical rod is perpendicular to the extending direction of the transverse rod. The cutter head is arranged at the lower end of the vertical rod, the cutter handle rotates to sequentially drive the transverse rod, the vertical rod and the cutter head to rotate together, the cutter head makes contact with a silicon material and then rotates and grinds the silicon material to complete barrel digging machining, and the transverse rod is adjusted in a sliding mode so that the distance between the vertical rod and the cutter handle can be suitable for machining of silicon barrels or s