The invention provides a high-temperature-resistance hydrographics transfer printing coating composition and a preparing method thereof. The coating composition comprises polyfunctionality resin, polyacrylate resin, a solvent, a conventional cross-linking agent and a high-temperature activation cross-linking agent. The preparing method comprises the steps of placing the polyfunctionality resin, the polyacrylate resin, the conventional cross-linking agent and the high-temperature activation cross-linking agent into the solvent in sequence, conducting uniform mixing, and then conducting curing; adjusting solid content to be 10-50% after curing ends, and conducting stir-discharging, so that the high-temperature-resistance hydrographics transfer printing coating composition is obtained. The high-temperature-resistance hydrographics transfer printing coating composition and the preparing method thereof have the advantages that a bi-component formula is adopted, and a good luster effect can be maintained in the later-stage high-temperature baking process; film forming property is high, and the problem of integral transfer failure can be solved to a large extent during transfer printing; the tolerance of later-stage operation to a concave-convex interface is high; waiting is not needed in each step of operation interval, and production efficiency is improved greatly.