The invention relates to a suspension device and a maintenance device and belongs to the technical field of safety devices for aloft work of electric equipment. The suspension device comprises a baseplate, a support frame, a suspension bracket and a lifting device, wherein the baseplate is detachably connected with one end of the support frame; the suspension bracket is detachably connected with the other end of the support frame; both the support frame and the suspension bracket are adjustable brackets; a first adjusting switch is arranged on the support frame; a second adjusting switch is arranged on the suspension bracket; the suspension bracket is detachably connected with the lifting device; a holding region for holding a lifted object is arranged on the baseplate; a push handle is arranged on one side of the baseplate; the first adjusting switch is used for adjusting the length of the support frame; and the second adjusting switch is used for adjusting the length of the suspension bracket. The suspension device is very convenient to transport and carry, and can meet different operation requirements by adjusting the lengths of the support frame and the suspension bracket.