Abstract: Aiming at the potential safety problems existing in the application of explosion-proof diesel engine and explosion-proof battery monorail crane in high gassy mine and mine rescue, the structure of self-propelled pneumatic monorail crane with self-contained aerodynamic force, which can work independently without air duct, is studied. The multi parameter coupling optimization design method of the pneumatic actuator is proposed, and the optimization parameters of the pneumatic actuator are obtained, which effectively improves the output torque of the pneumatic actuator. The pneumatic pipeline, pneumatic valve, pressure reducing valve and other pneumatic equipment are used to construct the full pneumatic step-by-step pressure reducing driving air circuit. A safe, reliable, high transportation capacity, quiet, noiseless and environment-friendly underground air powered monorail crane has been developed. It has no high temperature, no spark, no combustion and no electrical control during underground operation. It is suitable for high gas mines to ensure safe production. The test results show that the performance of the pneumatic monorail crane has been effectively improved.