The invention provides a pressing speed compensation method for a cold-rolling mill pressing system. The method comprises the steps that a pressing speed test is conducted, and a pressing speed and rolling force curve in the opening direction and a pressing speed and rolling force curve in the closing direction are obtained; corresponding pressing speed values are found in the pressing speed and rolling force curve in the opening direction and the pressing speed and rolling force curve in the closing direction according to the hydraulic cylinder acting direction, a current rolling force practical value and a current pressing speed value, and a compensation gain value is calculated; and the compensation gain is subjected to slope processing, a compensation gain slope value is obtained, andthe compensation gain subjected to slope processing is used for a hydraulic pressing controller. According to the pressing speed compensation method for the cold-rolling mill pressing system, linear compensation of the hydraulic pressing speed can be achieved, so that the hydraulic pressing speed is kept at a reference speed within the whole rolling force working range, and the adverse effects ofpressing speed variations and nonlinear drag on the performance of pressing control are eliminated.