The utility model belongs to the field of building materials and relates to a light-weight gypsum fireproof door core plate. The light-weight gypsum fireproof door core plate comprises a door core plate which is formed by adhering high-strength gypsum to chopped fibers, wherein the thickness of the door core plate is between 3 cm and 7 cm; and grid cloth is arranged on the upper and lower surfaces of the door core plate or in the middle of the door core plate. The utility model has the advantages that the pH value of the light-weight gypsum fireproof door core plate is neutral, so a door frame cannot be corroded, and the door core plate has the characteristics of high strength, low combined cost, simple and reasonable production process, good moisture-absorption and moisture-proof effects and long fireproof limit time, and is environment-friendly and pollution-free.