Pneumatic Presses are marked by features of high-motion speed, high productivity, energy conservation and environmental protection. The drawback is its low air system pressure, generally only 0.4-0.7 MPa, which unsuited to occasion require large output force. A new pneumatic press, based on quadratic orthogonal toggle force amplifier, is introduced in this paper. The output force of pneumatic piston is amplified for two times and force amplifying ratio can up to 20, thus to increase the output force substantially, although with constant piston diameter and system pressure. Moreover, with the application of symmetrical double-face rack-gear mechanism, radial force on piston rod and lateral force on pressure head are perfectly balanced. The entire mechanical system boasts features of low friction loss, low vibration and noise and high transmission efficiency.