Indexable helical end mills corn cutter, cutter body made of high quality alloy steel, after quenching, the cutter body with high strength, knife slot after finishing a surface nitriding treatment, so that the outer surface of the tool has a higher hardness, wear resistance of the cutter body increases, improving the life of the cutter. Groove cutter body is CNC machining or machining on machining centers, a qualified installation to ensure that the manufacturing precision cutter, with reliable interchangeability. The cutter is modular structure, with interchangeable tip. For CNC milling machine, boring and milling machining centers and large cutting capacity, can improve work efficiency.