The invention discloses a special fire-resistant and acid-resistant brick, which is represented by weight percentage. The raw material of the fire-resistant and acid-resistant brick contains 20-50% of mullite, 5-20% of corundum, 35-20% of a-Al2O, and 2% of bonded clay. ~12%, silica powder 5~20%, talcum powder 3~10% and SiO2 fine powder 2~6%. The materials are configured according to the proportioning ratio, then mixed and milled with a binder, trapped, dried, finally fired, and cooled naturally to obtain the special refractory and acid-resistant brick of the present invention. The product of the present invention uses mullite, corundum and clay as the main raw materials, and introduces some additives, so that the prepared product has high bulk density, low porosity, high compressive strength, strong wear resistance, and acid erosion resistance. Strong and other characteristics, and the high temperature index load softening temperature and refractoriness of the product of the present invention are far superior to conventional acid-resistant bricks, and can be widely used in acid regeneration roasters, petroleum, chemical industry, metallurgy, electric power, chemical fiber, papermaking, pharmaceuticals, chemical fertilizers, food And other anti-corrosion works.