Plate fixing device for punching machine tool

The invention relates to the technical field of punching machine tools, and provides a plate fixing device for a punching machine tool, the plate fixing device comprises a fixing device main body, connecting columns and a placing plate, one side of the fixing device main body is provided with a connecting frame, two sides of the top end of the fixing device main body are provided with the connecting columns, and the top ends of the connecting columns are provided with the placing plate. According to the plate punching device, the fixing structure is arranged, in the using process of the fixing device, a fixing rod is manually rotated to push a fixing plate to fix the fixing device generally, and due to the manual fixing mode, the fixing speed is low, the efficiency is low during fixing, and the plate punching efficiency is affected; therefore, through matched transmission among a second servo motor, a first fixing disc, a belt and a second fixing disc, a two-way screw rod is driven to rotate, the rotating two