The utility model discloses a
cutting device for laying electric wires and cables, which comprises a
cart, an L-shaped mounting plate is fixed at the top of the
cart, a rotatable mounting disc is arranged on the L-shaped mounting plate, a mounting rod is coaxially fixed on the mounting disc, an internal expansion mechanism is mounted on the mounting rod, and the internal expansion mechanism is fixed on the
cart. A
cutting mechanism is mounted at the position, away from the L-shaped mounting plate, of the top of the cart, two mounting lugs are fixed to the position, close to the
cutting mechanism, of the bottom of the cart, rear wheels are rotationally arranged on the mounting lugs, and two universal wheels are mounted at the position, close to the L-shaped mounting plate, of the bottom of the cart. The internal expansion mechanism comprises a two-way lead screw, a notch is formed in the mounting rod, the two-way lead screw is rotationally arranged in the notch, and two sliding blocks are mounted on the two-way lead screw. According to the utility model, winding drums of different models can be fixed, and a cable can be automatically released and
cut off when the cart moves, so that the cable is convenient to lay.