The utility model relates to an electric power maintenance device and especially relates to a subconductor spacing rod installation device. The technical scheme is as follows: the subconductor spacing rod installation device comprises a dual-hook, connecting rods, a rotation sleeve and a rotation hook, wherein one end of each connecting rod is provided with the dual-hook and the other end of each connecting rod is connected with the rotation hook through the rotation sleeve. The advantages are as follows: by using the subconductor spacing rod installation device, two subconductors can be hooked, and the spacing distance between the subconductors can be controlled within a proper range so that the maintenance time is shortened, labor is saved, and the problems of tedious working, long working time, high labor intensity and the like which are caused by a conventional working method can be solved, thus not only can the operation safety of maintenance workers is enhanced, the working efficiency is obviously improved.