Silicone rubber-based radiant thermal protection coating was prepared by MoSi₂-YSZ filler and characterized with ablation resistance and thermal shock resistance. Compared with traditional ablation coating， the high-emissivity coating with MoSi₂-YSZ has an emissivity over 0.93 in the range of 0.3~2.5 μm， the temperature rise of the backboard of high-emissivity coating is reduced by 60% in static heating condition， while the temperature rise of the thermal shock test is reduced by 30%. High-emissivity coatings exhibit hysteresis in response to temperature due to the heat dissipation of radiation during high temperature testing， the peak temperature change rate of the backboard is reduced by 40%. In addition， the dense oxide layer formed by MoSi₂ oxidation also has good protection and self-healing properties for the inner structure， which greatly increases the stability and reliability of the coating under high temperature conditions.