Aim To develop a portable medical hyperbaric oxygen cabin, which is used for soldiers to treat and cure the wounded in the highlands in time. Methods A small electric air pump was used as the model’s air source, and the capsule was made of sealed, foldable and high pressure-resisting materials. The air-supply system and the control system of the cabin were designed in integration and miniaturization. Finally an experiment of the cabin was carried on the human body physiology parameter testing under the environment of elevation 4000 meters, in which the feasibility and reliability of this system were investigated. Results This cabin sword-boat two meters with lightweight to carry. Experiments proved that the pressure in cabin could rapidly climb to standard atmospheric pressure, that could meet the requirement of human beings in the high altitude environment. This system might help the soldier in individual teams to acute and treat the plateau sickness, and also improve the oxygen supply technology for army in highlands.