The utility model discloses a drop out fuse's specialized tool is changed to area load, it includes that the T type connects and connects in the cross arm coupling assembling of T type joint rod portion and can dismantle and connect the external insulation vaulting pole that connects the head both ends in the T type with dismantling, and two external insulation vaulting poles all are equipped withinsulating drainage line outward, and outer end that the outer end of an insulating drainage line was equipped with connection lug, another insulating drainage line is equipped with the fastener, allis equipped with the conductor in head that the T type connects and the external insulation vaulting pole. When the in -service use, at first step on the pole by operator person and carry to treatingthe helpdesk, then insulate and shield, shield the back and connect this instrument on corresponding cross arm through cross arm coupling assembling, the outer connection lug of drainage line that will insulate after that is connected to on the drop out fuse to accomplish the drainage through fastener overlap joint drainage line, and then can carry out drop out fuse's area load and change. Can effectually shorten the activity duration, reduce operator person intensity of labour, improve work efficiency and operation security.