The invention discloses a suspension clamp installation device. When being used, the suspension clamp installation device is firstly upwards jacked up through a clamping frame, a suspension clamp is clamped through a V-shaped slot, and the clamped suspension clamp can be fixed onto a high-voltage cable; then the clamped suspension clamp is put into a clearance, after the clamped suspension clamp is put in place, a bolt is ejected into the suspension clamp through a bolt ejector rod, the other end of the bolt is exposed out of the other side of the suspension clamp, a nut is clamped through an inner groove surface of a screwing device at the moment, and the screwing device moves toward the bolt, and the nut is in butt joint with the bolt; then the screwing device is rotated, so that the nut is tightly screwed on the bolt; later, the screwing device is shifted through a shifting fork, so that a through hole located on the bolt and used for inserting a split pin is exposed; and the upper part of the through hole directly faces a pin push rod , and the pin push rod moves from top to bottom so as to push the split pin into the through hole at the moment, so that the end part of the split pin is splitted under the action of a splitting device, and the efficiency of suspension clamp installation is improved.