The invention relates to the technical field of power distribution equipment, and particularly to a backup protector of a novel large through-flow tripping structure for relieving the technical problem in the prior art that the tripping structure of the backup protector has poor contact and is easy to trip at any time. The backup protector of the novel large through-flow tripping structure comprises a first rotating part and a second rotating part; the firs rotating part has a first rotating shaft and can rotate around the first rotating shaft under the driving of external force; the second rotating part and the first rotating part are connected at one side of the first rotating part through a second rotating shaft, and a conducting part is arranged at one side of the second rotating part; and the first rotating shaft and the second rotating shaft are parallel with each other. According to the technical scheme, the backup protector works stably, and connection and disconnection of a backup protector circuit can be realized stably.