The utility model relates to a low-voltage power distribution system power saver bypass cabinet. The low-voltage power distribution system power saver bypass cabinet is composed of a power saving bypass cabinet and a power distribution system power saver; the power saving bypass cabinet is composed of a cabinet body, a smart electric meter, a switch, circuit breakers and a working condition indicating device; the power saving bypass cabinet is in matched connection with the power distribution system power saver; the power distribution system power saver is integrated in the power saving bypass cabinet; the power saving bypass cabinet is externally connected with a three-phase power supply; the smart electric meter, the circuit breakers and the switch are arranged in the cabinet body; the power distribution system power saver is connected into a power utilization loop through the switch and the circuit breakers; the cabinet body is provided with a panel, a front door and a back door; the working condition indicating device comprises indicating lamps and a working condition switching switch; the panel is arranged at an upper portion of the front surface of the cabinet body; the front door is installed at a lower portion of the front surface of the cabinet body; and the panel is provided with the indicating lamps and the working condition switching switch. The low-voltage power distribution system power saver bypass cabinet is advantageous in reasonable design, simple structure and convenient operation; and the low-voltage power distribution system power saver bypass cabinet adopts three vacuum circuit breakers as switching elements, and is matched with the smart electric meter and the indicating lamps, so electronic element control is not required, and therefore, the reliability and safety of electrical performance of the low-voltage power distribution system power saver bypass cabinet of the utility model can be enhanced.