The invention discloses a multi-combination insulation mobile maintenance rack, belonging to the mechanical field of a power system. The maintenance rack comprises a plurality of telescopic ladders and an auxiliary flange, wherein the auxiliary flange is fixed on the upper surface of a flange of a device to be maintained, the plurality of telescopic ladders are fixed at the periphery of the device to be maintained at equal interval, a rotation device is arranged at a position where sections of each telescopic ladder are connected, a threaded hole is formed in the upper surface of the rotation device, the maintenance rack also comprises longitudinal support rods, the longitudinal supports are in threaded connection with the threaded holes in a matching way, a transverse rod is fixedly arranged between adjacent longitudinal support rods, the ladder at the top section of each telescopic ladder is rotatably fixed on the auxiliary flange, meanwhile, the maintenance rack also comprises a hoop, the hoop is fixed at the device to be maintained, and the ladder at the bottom section of each telescopic ladder is connected with the hoop by a rope. By the maintenance rack, a worker can consider the surrounding of the device to be maintained during maintenance at a high altitude, the positions of the ladders are prevented from being frequently replaced, so that the labor intensity of the worker is reduced, meanwhile, the labor cost is also reduced, and the working efficiency is improved.