The invention relates to a high-temperature-resistant material and a preparation method thereof, the high-temperature-resistant material is prepared from the following raw materials: 30-80 parts of analumina-based homogeneous material, 5-35 parts of a waste sagger, 5-25 parts of an additive and 1-6 parts of a binding agent, and the additive comprises gold tailings, molybdenum tailings and clay; wherein the binding agent comprises silica fume. According to the high-temperature-resistant material provided by the invention, some industrial solid wastes can be utilized, and the prepared materialhas the advantages of high strength, reasonable expansibility matching, reasonable cost and the like.