The invention discloses a two-way pressurization stable limiting brick making machine which comprises a fixing base. A fixing top plate is installed at the top end of the fixing base, a multi-pressureexhaust mechanism is installed at the bottom end of the fixing top plate, and the multi-pressure exhaust mechanism comprises a hydraulic rod, a connecting plate, pressing blocks, shells, sliding blocks, rubber plugs, multi-pressure springs, pressing plates, vent holes, exhaust holes, connecting ropes and rubber columns. According to the two-way pressurization stable limiting brick making machine,multi-stage pressure application can be conducted in the material pressing process through the multi-pressure exhaust mechanism, so that the material pressing process can be gradually increased stageby stage, pressure borne by materials in the material and shell separation process can also be gradually decreased stage by stage, and then the phenomenon that formed bricks break as the materials are suddenly subjected to huge pressure or separation in the material pressing process is avoided; and besides, air can be rapidly discharged in the material pressing process, meanwhile, the inner sidesof the vent holes can be cleaned when the shells are separated from the bricks, and the bricks can also be conveniently separated from the surfaces of the shells.