The frame is composed of a base, an upper frame, a carrying template, a rotating pin, a rotating connecting plate, a pneumatic circuit and a control circuit, and is controlled by a PLC, and the opening and closing action is performed by the cylinder. It has the characteristics of compact structure, simple operation, stable performance and high production efficiency. The pneumatic formwork is suitable for automobile roof, automobile instrument panel, car seat cushion, backrest and large mold, and is suitable for single machine production and multiple units placed on the disc line for online use.