Self demagnetization device for cutting edge

The utility model relates to a self demagnetization device for a cutting edge, which comprises a rack, an insulated cutting edge support arranged on the rack, a driving mechanism, a demagnetization electrode head, a sliding block, a slide rail matched with the sliding block, two limit switches, an adjustable stop block, a fixed stop block and a control cabinet. The driving mechanism is used for driving the demagnetization electrode head and the sliding block to simultaneously move toward the length direction of the cutting edge piece. The adjustable stop block is arranged on the slide rail. Both the two limit switches are arranged on the sliding block, and are also arranged between the adjustable stop block and the fixed stop block. The demagnetization electrode head, the two limit switches and the driving mechanism are respectively electrically connected with the control cabinet. The device has the advantages that through the matching between the limit switche and the adjustable stop block and between the ot