Ablation-resistant heat-insulating coating and preparation method thereof

The invention provides an ablation-resistant heat-insulating coating and a preparation method thereof. The ablation-resistant heat-insulating coating comprises organic silicon resin, a ceramic precursor and organic metal salt, the organic metal salt is hydrolyzed in the polymerization reaction process of the organic silicon resin and the ceramic precursor to form a metal complex, and the metal complex is uniformly distributed in an interpenetrating three-dimensional network formed by polymerization of the organic silicon resin and the ceramic precursor. According to the invention, the organicsilicon resin and the ceramic precursor are polymerized to form three-dimensional network for mutual interweaving to form an interpenetrating three-dimensional network; the organic metal salt is uniformly dispersed in the interpenetrating three-dimensional network; according to the preparation method, the ablation-resistant heat-insulating coating with uniform components is formed, the finally formed coating is uniform in