It has been found through analysis of defect components and micrographs that “oil-burn” defects on nonoriented silicon steel surfaces,which often occur after cold rolling,are composed of Fe,0,Si and C.This study analyzed the formation mechanism of “oil-bum” defects and the strategies to prevent them,and proposed,according to the equipment and process status in the production fields,some relevant optimized control measures and process adjustment schemes from two perspectives of reducing the residual emulsion and avoiding the specific temperature range.The results demonstrate that the application of the proposed optimization measures effectively inhibits the formation of “oil-burn” defects. It has been found through analysis of defect components and micrographs that “oil-burn ” defects on nonoriented silicon steel surfaces, which often occur after cold rolling, are composed of Fe, 0, Si and C. This analyzes analyzed the formation mechanism of “oil-bum ” defects and the strategies to prevent them, and proposed, according to the equipment and process status in the production fields, some relevant optimized control measures and process adjustment schemes from two perspectives of reducing the residual emulsion and avoidance the specific temperature range. The results demonstrate that the application of the proposed optimization measures measures inhibits the formation of “oil-burn ” defects.