The invention discloses an intelligent circulating combustion method for a coal-fired boiler. The intelligent circulating combustion method comprises the following steps: firstly, mounting a combustor at one side of the boiler, and enabling a flue gas outlet of the combustor to communicate with a boiler hearth; secondly, introducing a combustion adjuvant into the combustor, and performing forced air supply on middle of the boiler hearth; thirdly, mixing pulverized coal with high-temperature steam, feeding the pulverized coal serving as primary air into the combustor for mixed combustion, and introducing generated high-temperature flue gases into the boiler hearth; fourthly, performing mixed secondary combustion on the high-temperature flue gases and secondary air blowing into the hearth, treating the flue gases generated by combustion, heating and converting condensed water into water vapor by using extracted heat energy, then back introducing the water vapor to an inlet end of the combustor and feeding the water vapor serving as primary air into the combustor; heating cold circulation flue gases by using the extracted heat energy, then back introducing the heated flue gases to an air inlet of the boiler, and feeding the flue gases serving as secondary air into the boiler hearth; and fifthly, arranging flow valves at a primary air feeding inlet and a secondary air feeding inlet and arranging a temperature sensor and a controller to regulate and control respectively-introduced amounts of the primary air and the secondary air. The intelligent circulating combustion method has the advantages of sufficient combustion, high utilization rate of heat energy, intelligent control, energy conservation and emission reduction.