The invention relates to an inorganic coating preventing incrustation from being generated. The inorganic coating is prepared from, by mass, 4-16% of inorganic resin, 4-16% of organic solvent, 17-23% of aluminum oxide, 17-23% of titanium dioxide, 3-7% of crystal whiskers, 3-7% of kaoline and 26-34% of film formation accelerant. The inorganic resin, the organic solvent, the aluminum oxide, the titanium dioxide, the crystal whiskers and the kaoline are sequentially added into a grinding machine to be ground and mixed to form a first preparation, the grinding machine rotates at the speed of 500 r / min, and grinding time is 45 minutes; the film formation accelerant is a second preparation mixed with the first preparation before construction. The inorganic coating has the advantages of being completely formed by combining inorganic nanometer materials, being free from smell, free from pollution to water resources and air, low in sintering temperature, safe, high in flexibility and rigidity, good in self-cleaning property, high in non-sticky property and high in heat conducting coefficient, and having an infrared radiation function, and harm to the human body is avoided.