Formed milling cutter for processing bore hole rabbet of engine cylinder block

The utility model discloses a formed milling cutter for processing a bore hole rabbet of an engine cylinder block. The bore hole rabbet comprises a rabbet step surface and a bore hole rabbet groove, wherein the inner wall of the bore hole rabbet groove is provided with an arc inner wall and a straight inner wall; the straight inner wall is joined with the rabbet step surface through the arc inner wall; the formed milling cutter comprises a cutter body, a plurality of main blades and side blades; the plurality of main blades are arranged at the front end of the cutter body; tool noses of the main blades are horizontally arranged; the main blades are used for processing the rabbet step surface; the side blades are arranged on the outer lateral walls of the front ends of the main blades; the tool noses of the side blades are connected with the tool noses of the main blades; the tool noses of the side blades are provided with arc tool noses and straight tool noses; the arc tool noses are used for processing the arc inner walls; and the straight tool noses are used for processing the straight inner walls. The formed milling cutter has the advantage that blades can be rapidly mounted and set, debugging is easy, and processing efficiency is high; and the tool is simple in structure and low in cost.