An energy-saving system for purifying and recycling oxygen from high-temperature oxygen-enriched flue gas, comprising a water washing mechanism for introducing the high-temperature oxygen-enriched flue gas, a compressor set connected with the water washing system through a pipeline, a compressor outlet heat exchanger connected with the compressor set through a pipeline, a gas-liquid separation tank connected with the compressor outlet heat exchanger through a pipeline, a temperature swing adsorption isobaric drying mechanism and a pressure swing adsorption purification mechanism connected with the gas-liquid separation tank through pipelines, a dedusting and filtering mechanism for introducing gas treated by the temperature swing adsorption isobaric drying mechanism and the pressure swing adsorption purification mechanism , and a cooling mechanism for cooling the water washing mechanism and the compressor outlet heat exchanger , wherein an output end of the temperature swing adsorption isobaric drying mechanism is connected with an output end of the pressure swing adsorption purification mechanism through a pipeline, and is connected with the dedusting and filtering mechanism through a pipeline, and the pressure swing adsorption purification mechanism is connected with the water washing mechanism; wherein the water washing mechanism comprises a flue gas inlet pipe for introducing the high-temperature oxygen-enriched flue gas and a normal-temperature water pipe for filling normal-temperature water, a first water scrubber respectively connected with the flue gas inlet pipe and the normal-temperature water pipe , a drainage pipe and a second water scrubber connected with the first water scrubber , and a gas outlet pipe respectively connected with the second water scrubber and the compressor set , wherein the cooling mechanism is connected with the second water scrubber through a pipeline, and the pressure swing adsorption purification mechanism is connected with the first water scrubber ; wherein the cooling mechanism is connected with a water cooling set connected with the compressor outlet heat exchanger through a pipeline and a low-temperature heat exchanger respectively connected with the water cooling set and the second water scrubber through pipelines. wherein the water washing mechanism comprises a flue gas inlet pipe for introducing the high-temperature oxygen-enriched flue gas and a normal-temperature water pipe for filling normal-temperature water, a first water scrubber respectively connected with the flue gas inlet pipe and the normal-temperature water pipe , a drainage pipe and a second water scrubber connected with the first water scrubber , and a gas outlet pipe respectively connected with the second water scrubber and the compressor set , wherein the cooling mechanism is connected with the second water scrubber through a pipeline, and the pressure swing adsorption purification mechanism is connected with the first water scrubber ; wherein the cooling mechanism is connected with a water cooling set connected with the compressor outlet heat exchanger through a pipeline and a low-temperature heat exchanger respectively connected with the water cooling set and the second water scrubber through pipelines. <EOS>