Device for preventing grounding knife switch from being mistakenly closed under live-line condition

The invention provides a device for preventing a grounding knife switch from being mistakenly closed under a live-line condition. The device comprises a base, a driving assembly, a transmission assembly and a baffle. The base comprises a bottom plate and side plates arranged on two opposite sides of the bottom plate, the length of one side plate is larger than that of the other side plate, and anoperation hole is formed in the position, extending out of the other side plate, of one side plate. The driving assembly is arranged on the other side plate, the input end of the driving assembly is connected with the output end of a switch cabinet bus voltage transformer to be installed, and the output end of the driving assembly is connected with the driving end of the transmission assembly. Oneend of the transmission assembly is fixedly arranged on the bottom plate, and the other end of the transmission assembly is connected with the baffle. When the driving assembly is in a non-electrified state, the baffle is arr