The invention discloses heat-resisting textile based on a carborane ceramic coating layer and a preparation method thereof. The heat-resisting textile comprises aramid fiber textile body and the carborane ceramic coating layer, wherein carborane ceramic is prepared from a carborane ceramic precursor, and the precursor is supported by a framework of cyclo-silazane, has a cross-linked network structure and has a very good ceramization yield in further crosslinking. Therefore, the compact ceramic coating layer can be formed on the surface of the aramid fiber; the provided precursor has convenient preparation technology, moderate preparation reaction condition, raw material easy to obtain and suitability for industrial large production; the aramid fiber textile processed by the coating layer has very excellent heat resistance and oxidation resistance.