The invention discloses a remote circuit breaker switching-on device used for a switch cabinet. The remote circuit breaker switching-on device comprises a main body. The main body is provided with an energy storage mechanism, a starting part, a signal device and a contact. The energy storage mechanism comprises a main shaft and a spring positioning sheet. The front end of the main shaft penetrates through the spring positioning sheet and a front wall, and the tail end of the main shaft is provided with the contact. A threaded section is sleeved by a power spring and a moving nut, a bare shaft section is sleeved by a limiting spring, and the front end of the main shaft is provided with a clamping groove. The starting part comprises a starting motor and a transmission mechanism. The transmission mechanism comprises a connecting rod, a transmission rod and an excitation baffle sheet. One end of the transmission rod can move forward under the driving of the connecting rod, the other end is enabled to move upward to push the excitation baffle sheet, and the excitation baffle sheet is further enabled to be released from the clamping groove. According to the invention, the simple energy storage mechanism is arranged, the remote circuit breaker switching-on device can be excited by a remote control receiver, and the remote circuit breaker switching-on device is simple in integral structure, convenient to use, small in size, light in weight, convenient to carry with a vehicle, simple in operation and very practical under emergency situations.