Abstract: The pressure sensor in F₄ stand of finishing mill of a pickling tandem cold mill unit is installed at the hydraulic valve station. There is a long pipeline between the valve station and the pressing oil cylinder, and there is pressure loss in the hydraulic pipeline, which leads to pressure measurement deviation and affects the accuracy of finishing rolling force calculation. The accuracy of rolling force calculation directly affects the accuracy of strip shape and thickness control. In response to the above issues, a pipeline pressure loss model is established to calculate the pipeline pressure loss, and the correctness of the pressure loss model is verified through simulation and experiments. Then, a rolling force compensation model considering pressure loss is established to analyze the deviation between thepressure at the valve station and the pressure in the hydraulic cylinder. The deviation rolling force is compensated by the rolling force compensation model, and the accuracy of the compensated rolling force calculation is improved compared to before compensation. The average deviation of rolling force calculation has decreased from 3% before compensation to 0.8%, the caculation accuracy of finishing rolling force is improved.