Low-voltage distribution box capable of automatically dissipating heat

The utility model discloses a low-voltage distribution box capable of automatic heat dissipation, which comprises a box body, a memory metal strip, a traction rope, a switch piece, heat dissipation plates and a heat dissipation unit, the heat dissipation plates are arranged on two sides of the outer wall of the box body in a sliding manner, one end of the traction rope is connected with the heat dissipation plates, and the other end of the traction rope penetrates into the box body to be connected with one end of the memory metal strip; the memory metal strip is located below the switch piece, the switch piece is electrically connected with the heat dissipation unit, and the heat dissipation unit blows cold air into the box body. By utilizing the characteristic that the memory metal strip can deform along with the change of the temperature in the box body, the heat dissipation plate is automatically controlled to move, the opening size of the heat dissipation holes is increased, so that the heat dissipation e