The invention belongs to the technical field of tension devices, and particularly relates to a hardware plate tension device. The hardware plate tension device comprises an empty box, a stepping motorand a controller, wherein a No.1 air cylinder, a No.1 air bag, a No.2 air cylinder, a hollow cavity, a No.2 air bag, a No.3 air cylinder and an impact cabin are arranged in the hollow cavity. The hardware plate tension device has the advantages that under the cooperation of the No.1 air bag and the No.1 air cylinder, the cooperation of the hollow cavity and the No.2 air cylinder, as well as the cooperation of the No.2 air bag and the No.3 air cylinder, and arranging the impact cabin, a hardware plate can be well pressed, and the tension effect of the hardware plate is guaranteed; while the hardware plate is tensioned, the hardware plate can be continuously impacted for multiple times by the impact cabin, so as to completely eliminate the internal stress of the hardware plate.