The structure and performance evolution of 1 200 ℃ ceramic tile repeated at 1 200 ℃ were studied. Results show that after heat treatment at 1 200 ℃ for 20 times, the ceramic tile with 1 200 ℃ exhibits good macroscopic thermal stability. During the repeated heat treatment, sintering occurs between the fibers, and the bonds are melted. Quartz fiber crystallization and grain growth result in fiber diameter changes, such as neckdown, and 14% shrinkage rate of Z direction, which in turn makes the compressive strength slightly increase, and the thermal insulation performance decrease. After 1 260 ℃ and 11 times of single-sided radiant heating, the Z-direction shrinkage rate was 5.58%, and the thermal insulation effect is reduced by 7.59%. However, the thermal insulation material can maintain the thermal insulation performance of the material after 6 repeated heating.