The invention belongs to the technical field of steelmaking smelting, and especially relates to a control method for a bearing steel slagging process for fully-plastic inclusions. Silicon carbide is used to carry out deoxidation in the early stage of LF refining, so deoxidation with silicon is used to replace traditional deoxidation with aluminum; quartz sands are added in the later stage of refining to carry out slagging, and the change of the alkalinity of the top slag is controlled to realize the plasticization of inclusions to avoid D (coarse) and DS inclusions in a finished product and control the content of B inclusions within 0.5 level; and an alloy adjustment component is added in the refining process to adjust the slag and fix oxygen in order to make the content of T.[O] in bearing steel less than 10 ppm. The silicon carbide is added in the LF refining process to make the silicon and aluminum originally existing in molten steel commonly play a role in deoxidation, so non-deforming inclusions not conducive to the fatigue life of the bearing steel, brought by a traditional aluminum deoxidation process, are reduced, the problem of non-deforming inclusions generated by deoxidation of the aluminum originally existing in the molten steel is avoided, and the plasticization and the purification of the inclusions in the bearing steel are wholly realized.