Low-voltage distribution box

The invention discloses a low-voltage distribution box, which comprises a box body, two top plates and a heat dissipation and moisture-proof mechanism, a heat dissipation opening is formed in the top of the box body, the two top plates are respectively mounted on the left side of the top of the box body, and the heat dissipation and moisture-proof mechanism is arranged on the box body and comprises a fixed shell. The fixing shell, the partition plate, the first drying agent containing shell, a through opening, a second drying agent containing shell, an exhaust fan, a connector, a first fixing pipe, a mounting head, a second fixing pipe, an air suction pipe, a hose, a suction head, a positioning rod, a moving block, a fixing block, a heating shell, a heating wire, a temperature sensor, a humidity sensor and a semiconductor chilling plate are matched with one another; the heat dissipation effect of the distribution box is improved, the moisture-proof performance is improved, external humid gas is prevented from