This paper creatively put forward a new rolling shear mechanism which is driven by one horizontally positioned hydraulic cylinder by analyzing the present hydraulic shear mechanism at home and abroad. Moreover, based on the linkage, the simplify model of PR-11RⅢ-level composite rod linkage mechanism is obtained. Besides, in order to meet the demand of pure rolling, the kinematical analysis about the rolling shear mechanism is achieved by means of the building of closed loop vector method, then the kinematical simulation analysis is calculated with the help of the software of MATLAB/Simulink. Finally, depending on the development project on extensive popularization of 2000 mm rolling shear mechanism driven by one hydraulic cylinder for some large machine company, the simulation of the mechanism motion trajectory is conducted. The result of the simulation and the trajectory shows that the horizontal offset of the shear blade arc and the value of the overlap between the upper and lower shear blade are meet the design requirements, thus fully proves the reasonable of the rolling shear mechanism and the correctness of the kinematical analysis.
