The invention discloses gypsum with good thermal shock resistance. The gypsum with good thermal shock resistance is prepared from, by mass, 50-60 parts of natural gypsum powder, 30-40 parts of slag powder, 10-15 parts of bauxite, 5-10 parts of glass fibers, 6-8 parts of silica sol, 3-5 parts of fluxing agent, 5-8 parts of binder and 2-3 parts of catalyst. Borax serves as the fluxing agent, sodium silicate serves as the binder, and lime powder serves as the catalyst. In this way, the thermal shock resistance of the gypsum can be improved, and the gypsum is not prone to crack in the casting mold firing process.