The invention provides a low-power-consumption control circuit and control method for a prepaid circuit breaker reclosing device. The low-power-consumption control circuit comprises a control signal detection module, a processing module, a frequency decreasing module, a frequency increasing module and an action executing module, wherein the control signal detection module is used for acquiring anexternal control signal; the frequency decreasing module is used for decreasing an operating frequency of the system; the frequency increasing module is used for increasing the operating frequency ofthe system; the action executing module is used for controlling the circuit breaker to act and acquiring opening-closing states of the circuit breaker; the control signal detection module is connectedwith the processing module; the processing module is further connected with the frequency decreasing module, the frequency increasing module and the action executing module respectively; the processing module realizes a low-power-consumption standby mode by virtue of the frequency decreasing module and realizes a high-frequency action mode by virtue of the frequency increasing module respectivelyafter the control signal of the control signal detection module is acquired. Based on the system and the method, normal switching can be performed, signal detection can be controlled, the power consumption of the system is reduced, and a product requirement is met.