Preparation method of high-entropy ceramic composite coating

The invention provides a preparation method of a high-entropy ceramic composite coating. The preparation method of the high-entropy ceramic composite coating comprises the following steps that step one, metal simple-substance powder, silicon carbide powder and a binder are prepared into metal simple-substance/silicon carbide composite powder, and the metal simple-substance powder is any five or more than five of zirconium, titanium, hafnium, tantalum, niobium, vanadium, chromium, molybdenum, tungsten, manganese or cobalt; step two, the surfaces of base materials needing coating are pretreated;and step three, a method of thermal spraying is adopted to spray the metal simple-substance/silicon carbide composite powder on the surfaces of the base materials, so that the high-entropy ceramic composite coating is synthesized through an in-situ reaction. The obtained coating has excellent performance, and the disadvantage that high-entropy ceramic composite powder is required to be prepared in the process of preparin