Thermal insulation cover have three to six layers, liner is high silica glass fiber cloth, stainless steel braided cloth, ceramic fiber cloth, glass fiber cloth or high-SI aluminum cloth, and insulating layer is ceramic or glass fiber or aerogel blanket, and the protection layer is silicone coated glass fiber cloth, tef-lon cloth or stainless steel braided cloth, which is water, oil, acid and alkali proof. The thickness is 5-150mm, which could be customized, temperature resistance could be as high as 1080 ºC. Normal lifetime is more than 5 years. And the energy saving rate is 25% to 40%.