High-temperature alloy cutting coating tool and preparation method thereof

The invention discloses a high-temperature alloy cutting coating tool and a preparation method thereof.The high-temperature alloy cutting coating tool comprises a tool base body and a multi-layer coating deposited on the base body, and the multi-layer coating sequentially comprises a transition layer, a periodic composite layer and a functional layer from the base body side to the surface side of the multi-layer coating; the periodic composite layer has an alternating laminated structure in which a first composite layer and a second composite layer are alternately repeated twice or more. The transition layer and the first composite layer have the same chemical composition, and the transition layer is composed of a compound represented by TiaAlbCrcN; the second composite layer and the functional layer have the same chemical composition, and the second composite layer is composed of a compound represented by TidAleCrfMgLhN. The high-temperature alloy cutting coating tool provided by the invention has relatively