The utility model provides two cluster dead end insulator change the device, including setting up the first fixture on first yoke plate, the second fixture of setting on the second yoke plate, the connection is first, crimple mechanism between the second fixture, first fixture and/or second fixture adopt square yoke plate fixture, square yoke plate fixture are used for connecting the square yoke plate of offering the slotted hole, parallel interval two relative splint have, two splint outer ends correspond respectively offers the pinhole that is used for connecting square yoke plate, it to block the corner of locating coupling nut department on the square yoke plate still to correspond on two splint to be formed with, during installation, two splint press from both sides square yoke plate tightly in among them, and connect fixture on square yoke plate through pinhole and square yoke plate slotted hole that the bolt passed on two splint, the coupling nut department on the square yoke plate is located to the corner card of two splint. The utility model relates to a rationally, simple to operate, easy operation can alleviate operation personnel's intensity of labour, improves work efficiency, and can realize earth potential the?job?action, fail safe nature is high. The utility model also provides a square yoke plate fixture.