The invention provides a dual-power self-switching fee control metering device. The dual-power self-switching fee control metering device comprises a support, wherein a main shaft and a linkage shaft are arranged on the support; a gear is arranged on the main shaft; the main shaft is provided with a positive cam and an inverse cam positioned at two ends of the gear respectively; another gear is also arranged on the linkage shaft; the gear on the main shaft and the another gear on the linkage shaft are matched through chain transmission; the main shaft is connected with a motor; a mounting hole for mounting a circuit-breaker three-phase synchronous shaft is formed in the support; the circuit-breaker three-phase synchronous shaft is fixed in the mounting hole of the support through an elastic bolt; and the circuit-breaker three-phase synchronous shaft is in transmission fit with the linkage shaft. According to the dual-power self-switching fee control metering device, a standby power supply can be automatically switched under the condition that a frequently-used power supply is powered off, and the frequently-used power supply can be automatically switched under the condition that the frequently-used power supply is powered on, so that the device is safe in switching, perfect in performance and high in degree of automation, and the safety and reliability of power utilization can be guaranteed.