A dedicated polishing tool for an end part of a wire comprises a fixed shell. The lower part of the fixed shell is opened. A through hole is formed in the upper part of the fixed shell. A knife rest is mounted in the middle on the inner side of the fixed shell. A fixed hole is formed in the knife rest. A plurality of blades are mounted in the fixed hole. A certain inclined angle is formed between the plane where the blades are positioned and the horizontal plane, and when the dedicated polishing tool is used for polishing, aluminium skimmings generated in polishing can slide out along the blades, so as to avoid the condition that when the wire is polished, the aluminium skimmings generated in polishing cannot be discharged in time.