The invention relates to a yarn-winding iron disk, comprising a bottom disk, a yarn-winding column vertically arranged in the middle of the bottom disk, a disk cover arranged on the yarn-winding column, brush hair arranged on the disk cover and extending out of the disk cover, and a pressing plate arranged on the disk cover for fixing the brush hair. Because the brush hair is arranged, when silk yarns are taken from a place above the yarn-winding iron disk, the brush hair has a certain effect of blocking the silk yarns so as to prevent the silk yarns from falling too fast to result in over looseness, thus, the fault probability of production equipment is reduced, and the production efficiency is improved.