The invention relates to a cutting method for a mixed-oil section in refined oil product batch transportation. The method comprises the following steps: calculating the concentration distribution of mixed oil at a terminal station; calculating a mixed-oil length ratio corresponding to the concentration of a front oil product in the mixed-oil section; calculating allowable mixing concentrations of the front oil product and a rear oil product in the mixed-oil section; calculating a first maximum volume of the rear oil product allowed to be mixed into a front oil product tank and a second maximum volume of the front oil product allowed to be mixed into a rear oil product tank respectively; calculating a first concentration threshold value of the front oil product allowed to enter the front oil product tank and a second concentration threshold value of the front oil product allowed to enter the rear oil product tank; judging whether the first concentration threshold value is less than the second concentration threshold value or not, if yes, carrying out the next step, if not, cutting the mixed-oil section into three sections; and calculating an optimal cutting concentration, and correspondingly cutting the mixed-oil section into two sections. According to the method, by monitoring and calculating the concentrations of the mixed-oil section and the real-time states of the oil tanks, the zero-mixed-oil cutting of the mixed-oil section, which meets cutting conditions, is realized, and the operation cost is effectively reduced.