The invention discloses a leveling plate shearing device, and particularly relates to the technical field of plate shearing machines. The leveling plate shearing device comprises a mounting block, a workbench is fixedly mounted on the surface of the top end of the mounting block, a working plate is detachably mounted on the surface of the workbench, and a connecting block is fixedly mounted at the bottom end of the interior of the working plate; and a leveling device is fixedly mounted on the surface of the top end of the connecting block, and a mounting plate is detachably mounted at one side of the interior of the working plate. Through mutual cooperation of a first sleeve rod, a reset spring and a second sleeve rod, the effect of short correction time is achieved, the problems that when an existing leveling plate shearing device works, due to the fact that the device is complex to install, correction can be conducted only by disassembling the device once the device needs to be corrected, the time is increased, the working efficiency is reduced, the correction time is long, and the development of the device is influenced are solved, and the practicability of the device is enhanced.