Tapered drilling and milling integrated tool

The utility model discloses a conical drilling and milling integrated tool which comprises a drill bit. The plough mill further comprises a plough mill body. The outer wall of the lower end of the plough milling body is a big-end-up conical head, and the upper end of the drill bit is fixedly connected with the outer conical surface of the conical head; the outer diameter of the drill bit is smaller than the maximum outer diameter of the conical head. The plough milling body comprises a main body and hard alloy teeth, and the hard alloy teeth are laid on the outer wall of the plough milling body. The tool is used for drilling a cement plug, a sand plug and the like of an oil-water well, a cement sheath on the wall of a sleeve is removed while the plug is drilled, the plug drilling process and the plough milling process are combined, the tool is designed to be conical, a drill bit at the bottom drills holes, a PDC material is designed on the side face of a plough milling body to remove the annular cement sheath