The utility model relates to an interphase spacer used in a power transmission circuit, in particular to a suspension device of the interphase spacer. The device comprises the interphase spacer and wire holders, wherein the wire holders are arranged at the two ends of the interphase spacer. The device is characterized in that the wire holders comprise two symmetrical wire holder bodies, rubber sleeves and hoops, wherein the rubber sleeves are arranged in the wire holder bodies; the hoops are arranged outside the wire holder bodies; the wire holder bodies are semi-circular arc cylinders; a lifting lug is fixed in the middle of one side of the wire holder body; a hole is opened on the lifting lug; and the two ends of the C-shaped hoop are opened with holes matched with the lifting lugs. In the utility model, the hard connection is changed into the soft connection between the interphase spacer and the power transmission circuit; when in soft connection, the rubber sleeves are sheathed on leads at the installing position, are clamped on the leads by the two symmetrical wire holder bodies, and then are articulated with the interphase spacer by the lifting lugs arranged on the wire holder bodies and bolts arranged on the lifting lugs, therefore, the device has the advantage of convenient installation, which can solve the problem existing in the prior art effectively.