An improved gypsum tray is provided, which includes a body. The body has an indented accommodation basin, and gypsum is poured into the accommodation basin to form a tooth mold. The present invention can join a fixing base to a bottom of the body, and the improved gypsum tray is installed on the fixing base of the gypsum tray through the fixing base. Also, after the gypsum forms the tooth mold in the accommodation basin, the fixing base can be joined to a bottom face of the tooth mold. When the tooth mold is installed on the fixing base of the gypsum tray through the fixing base, an angle may be adjusted optionally, thereby solving the problem that an angle cannot be adjusted during a conventional rectifying operation of a tooth mold.
