Wire harness cut-off device with automatic cutting function

The invention discloses a wire harness cut-off device with an automatic cutting function. The wire harness cut-off device comprises a cutting machine housing body, an L-shaped support plate and a transmission support frame body, wherein a sliding rail is arranged at the top end of the cutting machine housing body; the L-shaped support plate is arranged at the top end of the cutting machine housing body; a hydraulic lifting rod is arranged at the top end in the L-shaped support plate; a cutting fixing rod is arranged at the output end of the hydraulic lifting rod; mounting positioning blocks are arranged at the two sides of the cutting fixing rod; the transmission support frame body is arranged at one end, away from the L-shaped support plate, of the cutting machine housing body; a pressure sensor is arranged in the cutting machine housing body; and a single chip microcomputer is arranged at the top end of the L-shaped support plate. By the adoption of the technical scheme, the cut-off device facilitating auto