Internal mixer rotor

The invention belongs to the technical field of rubber and plastic machinery and equipment, and particularly relates to an internal mixer rotor. Spiral angles are increased at a first long edge, a first short edge, a second long edge and a second short edge to change the circumferential flow of rubber, the length of the first long edge and the second long edge reaches half of a spiral lead, a better axial movement performance is achieved, and the distribution and dispersion of fillers and compounding agents are facilitated; with the shear heating and the decrease of the mooney drilling degreeof the rubber, the widened first long edge, first short edge, second long edge and second short edge ensure sufficient shear performance with the inner wall of an internal mixer, the stretching effectof the rubber is increased, and the full flow and dispersion of the rubber are facilitated; and the first long edge, first short edge, second long edge and second short edge in a convex block shape as well as the large spiral