The utility model discloses a regulating device used for preassembling arch bricks of a glass kiln. The regulating device comprises a bottom plate, a steel framework and an arched plate, wherein the steel framework is arranged on the bottom plate; the arched plate is arranged on the steel framework; the arched plate is in threaded connection with a plurality of regulating top threads protruded on the upper surface and the lower surface of the arched plate. By adopting the technical scheme, the arch bricks are paved on the arched plate, and the length for each regulating top thread protruding on the upper surface of the arched plate is regulated under the arched plate by using a spanner, thus, the paved arch bricks can be regulated in span and height. The steel framework is formed by assembling profile steel through bolts. The regulating device used for preassembling the arch bricks of the glass kiln has certain rigidity, is not easy to deform, can be easily disassembled or assembled and can be repeatedly used.