An auxiliary broken line connecting device applicable to overhead lines relates to the field of connection of broken overhead lines, and is used to realize fast and efficient overhead line connection. The technical scheme is as follows: the auxiliary broken line connecting device applicable to overhead lines comprises a base plate, a rack, a lifting rod, a left bracket, a right bracket, a slide bar, at least two grippers, a left connector and a right connector, wherein the base plate is arranged along the left-right direction, the rack is arranged on the upper surface of the base plate, the lifting rod is connected to the bottom of the base plate, the left bracket is connected to the left end of the base plate, the right bracket is connected to the right end of the base plate, the left end of the slide bar is connected to the left bracket, and the right end of the slide bar is connected to the right bracket. The beneficial effect is that a broken overhead line can be connected safely and efficiently using the device.