This paper presents an innovative thermal protection coating material for solid rocket motors, that was subjected to high heat flux in a short time for arc-heated wind tunnel test. It is observed that the back surface of the coated samples with thermal protection coating can be cooled to 144℃ with a drop of 300℃ at least in comparison with that of the uncoated samples. The results showed that the back temperature of the samples with 0. 5 mm coating was little superior to that in the case of 0. 8 mm coating. Moreover, the back temperature of the coated samples cured at room temperature with a drop of 30℃ by contrast with that of the samples cured at high temperature, and the samples in both cases have the back temperature below 234℃ in accordance with the design value of less than 350℃.