The invention discloses a low-voltage power distribution cabinet comprising a cabinet body and a cabinet door used for sealing the cabinet body. A first fan is arranged at the bottom of the cabinet body. A first partition board is provided with ventilation holes matching the first fan. An intelligent temperature control system used for controlling the rotation of the first fan is mounted on the cabinet door. The left and right side walls of the cabinet body are of a double-layer structure. Each gap is provided with a water outlet hole at the bottom. A second partition board is arranged in the middle of each gap. Each second partition board is provided with a first through hole. First air outlet holes are arranged in the inner wall of each gap. Second air outlet holes are arranged in the outer wall of each gap. A slider is arranged at the bottom of each gap. Each gap is provided with threaded holes in the outer wall above the corresponding second partition board. A wire fixing device is connected in a threaded manner into the threaded holes of each gap. The beneficial effect is that the problem on heat dissipation of the power distribution cabinet is solved, and the electrical safety of the low-voltage power distribution cabinet soaked in water is ensured.