The utility model provides a transformer substation storage cell afterflow device of opening a way, relates to the battery afterflow technical field that opens a way, and its structure is: the negative pole and the fuse 1 of battery are connected through the wire, the anodal of battery is connected through the wire with fuse 2, fuse 2 loops through the triode, the LED lamp, resistance R3 is connected through the wire with fuse 1, fuse 2 and fuse are connected with resistance R1 and resistance R2 through the wire between 1, be connected through the wire between triode and resistance R1 and theresistance R2, fuse 2 and fuse are connected with relay and diode through the wire between 1, fuse 2 is connected with through the wire with fuse 1 and normally opens the node, normally open the node,relay and diode, resistance R1 and resistance R2 are parallelly connectedly. The utility model has the advantages of direct current system collapse in the station of causing because storage battery withdraws from the operation has been reduced for the protect function that stands entirely loses and causes the failure to operation of protection accident, has reduced the possibility that has a power failure on a large scale.