Unequal-blade-diameter end mill

The utility model discloses an unequal blade diameter end mill, which comprises a handle part and a milling part positioned at the front end of the handle part, the milling part is provided with a first cutting blade group, a second cutting blade group and a plurality of blades, and a spiral chip groove is arranged between two adjacent blades. The first cutting edge set comprises a first end edge distributed in the radial direction and a first spiral edge distributed in the axial direction on one edge petal, the second cutting edge set comprises a second end edge distributed in the radial direction and a second spiral edge distributed in the axial direction on the other edge petal, and the diameter of the first end edge is larger than that of the second end edge. According to the utility model, the long teeth and the short teeth with different blade diameters are arranged, so that the actual cutting amounts of the two adjacent end teeth are different, cutting forces with different sizes are generated, and the