The utility model discloses a portable voltage-transformation absorbing oxygenator which comprises a shell body, a mounting plate, a partition board, an air filtering device, a voltage-transformation absorbing oxygen generating device, an oxygen supplying device composed of an oxygen storing pot, a reducing valve and a filter, a heat radiating device and an electrical control device. The portable voltage-transformation absorbing oxygenator is characterized in that the devices are arranged in one space or more than two spaces in the shell body; the local part of the shell body is provided with one or more mounting plates, and the corresponding two sides of the mounting plates are provided with the elements. Zeolite molecular sieve material is used as the sorbent, and medical use oxygen with the concentration being more than or equal to 90 percent is realized through the voltage-transformation absorbing circulating process. The oxygenator has small volume, light weight (less than or equal to 5 kg), simultaneously, a handle and a brace are arranged, thereby having convenient carrying, and being an ideal product for oxygen therapy and oxygen health-care for hospitals, families, offices, recreation grounds, air-conditioning cars and outgoing travel.