In order to eliminate the risk of inflammable and explosive, spraying ablation-resistant heat-insulating paint was realized by using non-inflammable and non-explosive solvent SK-410B as the diluents instead of gasoline. The shear strength,low temperature performance and hygrothermal property were tested. Arc heated wind tunnel test has shown that the coating has excellent thermal protection performance. The maximum temperature of the backside is 55℃. This method can satisfy the use requirement.