The invention discloses an isolating switch comprehensive overhauling system based on a mobile square cabin. The isolating switch comprehensive overhauling system comprises a cabin body, wherein a walking mechanism is arranged below the cabin body; one end of the cabin body is connected with a headstock; the other end of the cabin body is provided with an entrance/exit and a sealing door; and a hoisting device, an overhauling platform, a tool and instrument platform and an air conditioning device are arranged inside the cabin body. An appropriate environment is provided for overhauling operation of an isolating switch during movement of the square cabin, so that internal parts of the isolating switch are prevented from being damaged by damp air carrying large-particle dust; smooth and safe proceeding of the overhauling operation is ensured; and great convenience is brought to the overhauling operation.