The invention relates to the field of power distribution cabinets and particularly relates to a 330V low-voltage AC power distribution cabinet which comprises a cabinet door, a fixed board, a dust removing mechanism, a switch mounting hole, a pay-off mechanism, a cabinet body, a heat dissipation mechanism, a fan, a transmission mechanism and an unloading mechanism. The inside of the cabinet body is provided with the pay-off mechanism for preventing a wire insufficiency of maintenance personnel during maintenance and providing wires for the maintenance, a wire at the surface of a rotating shaftis pulled to realize the rotation of a toothed disc in a fixed disc, the internal part of the fixed disc is rotatingly connected to the toothed disc arranged in an inclined way, the rotating shaft islimited, the wire is easily intercepted, the operation is simple, the electric wire is saved, the internal part of the fixed board is rotatingly connected with the dust removing mechanism, and dust is collected in the fixed board. After the fan is rotated, the transmission mechanism is driven, the transmission mechanism drives the dust removing mechanism located inside the fixed board to rotate,so the fan blows the collected dust out, the inner top surface of the fixed board is provided with an inclined board in an inclined way, and the dust is prevented from entering the cabinet body when the fan processes the dust.