The invention relates to a method for improving dry rubbing fastness of a smooth-haired slubbed product. The process flow of the method is as follows: getting grey cloth of the smooth-haired product, performing primary washing, milling, re-washing, dewatering, drying, decating, napping, shearing, performing wet brushing, drying, lustring, shearing, steaming and trimming, steaming and brushing, decating and getting a finished product, wherein the milling process conditions are as follows: auxiliary agents comprise 2% owf (on weight of fabric)-2.5% owf of Igephon T, 3% owf-3.5% owf of oleate soap and 0.8-1% owf of Invalon DAM dispersant; the milling time is 60-90min; and the milling temperature is 45-50 DEG C. The method mainly comprises the steps that the dispersant is added in the milling process to disperse dust and dye particles which are washed down so as to prevent the dust and the dye particles from being re-stained on fabric, enable the dust and the dye particles to be washed away in the subsequent washing process and further improve the dry rubbing fastness. According to the method, compared with normal products, the dry rubbing fastness of slubbing can be improved from level half to level1.