Energy saving thermal insulation furnace in the metallurgy field, developed for die casting machine holding furnace poor thermal insulation, furnace insulation layer cracking off, high energy consumption, waste and short service life of technical problems. The key technique to solve the above technical problems lies in the choice of materials with high properties of furnace structure and reasonable design of insulation layer. In the product structure design, selection ofinsulation layer of aluminium silicate insulating materials, lining layer selected the company the use of modern industrial structure ceramics preparation technology of independent development and production of high nitrogen compound ceramic lining structure material, so that the product has good insulation properties, aluminum non stick, do not fall off, no fouling, corrosion resistance, high temperature resistant, erosion resistant, no pollution to liquid aluminum, good energy saving effect and long service life etc.. Can be customized according to customer requirements.