The invention discloses a foldable multifunctional circuit maintenance tool. The foldable multifunctional circuit maintenance tool comprises a large spanner; one end of the large spanner is connected with a telescopic device through a hinge; the other end of the telescopic device is connected with a multifunctional maintenance device through a hinge; the large spanner, the telescopic device and the multifunctional maintenance device can be folded together; a spanner groove is formed in the surface of one side of the large spanner; circular grooves are formed in the surfaces of the two opposite sides in the spanner groove correspondingly; bearings are arranged in the circular grooves; a rotating rod is inserted between a set of bearings; the rotating rod is sleeved with a small spanner; a rotating groove is formed in the small spanner; the rotating rod is inserted in the rotating groove; a fixed groove is formed in the rotating groove; the rotating rod is provided with a fixed block embedded in the fixed groove; and a pull handle is arranged on the surface of the outer side of the small spanner. The foldable multifunctional circuit maintenance tool has the beneficial effects of multifunction, convenience in use and less occupied space.