The invention provides a novel micro-arc oxidation hanging tool which comprises a hanging rod and a clamping mechanism arranged at the bottom of the hanging rod. A lifting hook is arranged at the top of the hanging rod. The bottom of the hanging rod is rotationally connected with the clamping mechanism through a pin shaft. A bolt and a nut which are detachable are adopted in the clamping mechanism. An electricity tripping connecting line hole originally formed in an aluminum alloy part of an overhead line system is used for fixed connection of the bolt and the nut. An elastic sealing ring is arranged on the connecting face of the hanging tool and the part. By the adoption of the novel micro-arc oxidation hanging tool, connection is achieved in a detachable threaded manner, so that the hanging tool has the beneficial effects of being easy to install and detach and reusable; a contact point is sealed through the elastic sealing ring, so that the phenomenon that partial discharge happens due to the entry of an electrolyte is avoided, and the quality of a micro-arc oxidation film is effectively improved.