Fan power-saving control system

The utility model relates to a fan power-saving control system, which is structurally characterized in that positive and negative electrodes of a control driving module are connected with positive and negative electrodes of a three-phase rectifier bridge, an output end of the control driving module is connected with an input end of a power-saving contactor, and an output end of the power-saving contactor is electrically connected with an output end of a mains supply contactor and an output end of a three-phase power supply through wiring; the input end of the three-phase rectifier bridge is electrically connected with the input end of the commercial power contactor and the circuit breaker through wiring, the input end of the three-phase power supply is electrically connected with the circuit breaker, and the power supply management module is electrically connected with the relay controller power supply; the power management module is in signal connection with the control driving module, the microcomputer cont