The invention provides an automatic plate inserting system for an insulated brick. The automatic plate inserting system comprises a mechanical arm, a material incoming platform, a transfer platform, an insulation plate automatic inserting device and an insulation plate automatic sorting device; the material incoming platform is provided with a tray for transporting the insulated brick, the transfer platform is provided with a transfer rack containing the insulated brick, and the mechanical arm is used for transporting the insulated brick between the material incoming platform and the transferplatform; the insulation plate automatic inserting device is arranged above the transfer rack, the insulation plate automatic inserting device includes a plate inserting mold, and a plurality of firstcylinders are arranged above the plate inserting mold; and the insulation plate automatic sorting device is arranged on one side of the insulation plate automatic inserting device, and the insulationplate automatic sorting device comprises an insulation plate sorting mold plate capable of moving to the upper portion of the plate inserting mold. According to the automatic plate inserting system,the plate inserting mold and the cylinders cooperate to be used, a multi-cylinder fixed-distance inserting manner is adopted in the plate inserting process, an insulation plate is automatically inserted into the insulated brick, and the production efficiency is greatly improved.