<p>Tailor-rolled blanks (TRBs) are strips characterized by a continuously varying thickness along their length, providing advantages such as reduced weight, enhanced strength, and superior surface quality. TRB upward-rolling is a dynamic rolling technique in which the rollers exhibit vertical velocity during the rolling. This technique involves significant elastic deformation in both the rolls and the workpiece, complicating the investigation of upward-rolling force and the changes in deformation parameters within the mechanism. The mathematical models are developed to represent the rolling force and deformation parameters, taking into account the unique aspects of TRB upward-rolling. Finite element simulation and a backpropagation neural network are employed to establish the force arm coefficient model for TRB upward-rolling. Based on this model, the metal flow velocity field that satisfies the motion constraints of the deformation area is proposed, considering the specific characteristics of the deformation area. The force required for plastic deformation during rolling is determined by evaluating the power of each component and correlating the force arm coefficient with the rolling torque. By leveraging the coupled iterative relationship between rolling force and roller flattening radius, a model for analyzing rolling force in upward-rolling is developed. A comparison between the model’s calculated values and experimental data demonstrates a high degree of accuracy. Furthermore, the effects of the inclination angle of the transition area, friction factor, and workpiece tension on the force and deformation parameters are researched, elucidating the underlying mechanisms of force and deformation parameter variations in the upward-rolling.</p>