Fireproof insulated cable distribution box

The utility model discloses a fireproof insulated cable distribution box which comprises a cabinet and a fire extinguishing unit. A case door is hinged to the left side of the front surface of the case through a hinge, heat dissipation grid openings are formed in the lower ends of the left and right surfaces of the case, and a smoke sensor is arranged on the top wall surface of the case; the fire extinguishing unit is arranged at the rear end of the upper surface of the case, and the lower end of the fire extinguishing unit penetrates through the top wall surface of the case and extends into an inner cavity of the case; the fireproof and insulated cable distribution box further comprises a PLC, the PLC is arranged at the upper right corner of the front surface of the box door, the input end of the PLC is electrically connected with an external power source, the output end of the smoke sensor is electrically connected with the input end of the PLC, and the fireproof and insulated cable distribution box is ensu