Abstract: The crack healing of cold heading steel wire was studied. The hole deformation characteristics of the wire was analyzed by the method of steel bar marking deformation analysis, and the metallographic analysis of the healing layer was carried out by the material hot upsetting experiment. The evolution process of subcutaneous cracks was numerically simulated and analyzed by Abaqus software. Finally, the influencing of results heating temperature, heating time and deformation amount on industrial production were analyzed statistically and experimentally. The results show that increasing heating temperature and time and deformation can promote crack healing.