The invention relates to the technical field of self-rescuers, and discloses a reciprocating compressed
oxygen self-rescuer which comprises a body, a compressed
oxygen bottle and a
medicine bin are arranged on the body, an inner cavity is formed in the
medicine bin,
medicine used for absorbing
carbon dioxide is arranged in the inner cavity, and a first connector and a second connector which are communicated with the inner cavity are formed in the medicine bin. An air bag is connected between the compressed
oxygen bottle and the first connector, an oxygen outlet of the compressed oxygen
bottle is communicated with the first connector through the air bag, and a switch pressure reducing valve is arranged on the compressed oxygen bottle. The reciprocating type compressed oxygen self-rescuer is low in production cost, and
breathing is smooth when the reciprocating type compressed oxygen self-rescuer is used; when a
human body breathes once, internal gas can flow through the medicament twice, so that the
absorption efficiency of the medicament on
carbon dioxide is improved, the absorption is more sufficient, the
carbon dioxide concentration is prevented from rising too fast, and the safe use time of the self-rescuer is prolonged; the ejector rod is accurately pressed through the air supplementing pressure plate to increase the flow discharged by the compressed oxygen bottle, so that different
oxygen inhalation requirements are met, use is flexible, and the operation difficulty is low.