Device and method for removing short-length bars

The invention discloses a device and method for removing short-length bars. The device comprise a conveying roller table, a movable baffle and a separating device, wherein the conveying roller table is arranged on one side of the separating device; the other side of the separating device is a short-length collecting area; the movable baffle is arranged below or above a conveying surface of the conveying roller table; the separating device comprises a supporting plate, a supporting roller, a jacking mechanism, a movable frame and a fixed support; the supporting plate and the supporting roller are fixedly arranged on the movable frame; the supporting plate is arranged above the supporting roller; the upper end of the jacking mechanism is connected with the movable frame; the lower end of thejacking mechanism is connected with the fixed support; the supporting plate and the supporting roller are driven by the jacking mechanism to move up and down through the movable frame; before the jacking mechanism jacks up,