The utility model relates to a device is increased on basis belongs to the technical field who protects on the overhead transmission line basis, the problem of the technique is solved for: the utility model provides a simple structure, convenient operation's device is increased on basis, the technical scheme who adopts does: including increasing the device body, it includes upper junction plate, lower connecting plate and setting up at upper junction plate stiffener between the connecting plate under and to increase the device body, be provided with the connecting hole on the upper junction plate, be provided with down the connecting hole down on the connecting plate, it is continuous with the column foot board of shaft tower that the upper junction plate passes through connecting bolt, lower connecting plate passes through rag bolt and links to each other with indisputable tower foundation, be applicable to electric power system.