Abstract: Discussed here in the essay are the core contents of the full oxygen combustion technology-based intelligent，green，and low carbon modification project of the circular furnace heating process，involving such aspects as the improving of the oxygen and gas pipe networks，full oxygen burner arrangement，instrument control system and the configuration of the intelligent combustion system，etc. The benefit as produced from the modification project is verified with relevant production data. Thanks to the modification，the full oxygen combustion technology has tremendously shortened the billet heating cycle of the circular furnace，and got the in-furnace heat distribution optimized，and the temperature field uniformed so as to get the productivity and the product quality improved. Moreover the emission tonnage of the nitrogen oxides is reduced by 98%，and the fuel consumption is decreased by at least 28%. The successful application of the full oxygen combustion technology to the circular heating furnace has provided technical reference and practical case for green development and energy-saving and consumption reduction of the iron and steel industry.