The invention relates to a magnetic field-surrounding oxygen-collecting device, a furnace kiln combustion system containing the magnetic field-surrounding oxygen-collecting device and a magnetic field-surrounding oxygen-collecting combustion method. The magnetic field-surrounding oxygen-collecting device comprises a gas inlet pipe section, a vortex pipe section, an oxygen collecting pipe section,a nitrogen-oxide separation pipe section and an oxygen discharge pipe section which are connected in sequence; and the oxygen collecting pipe section is composed of a shell, cylindrical magnets and amagnetic conductive metal blanket, a plurality of cylindrical magnets are arranged at intervals around the inner wall of the shell to form a magnetic field ring, and the magnetic conductive metal blanket is arranged on the side of the magnetic field ring to form magnetic field surrounding. The magnetic field-surrounding oxygen-collecting device and the magnetic field-surrounding oxygen-collectingcombustion method provided by the invention can improve an oxygen content of a combustion-supporting gas flow, have low energy consumption, and can improve combustion efficiency, save fuel, reduce carbon dioxide content and significantly improve thermal efficiency, thereby facilitating promotion.