A nonflame combustion technology using thermal cyclic carrier of molten salt introduced in this paper is developed based on the knowledge of energy chemistry, fuel cell and combustion. In this technology, a whole combustion is divided into two steps, i. e. section of producing oxide and section of combustion. In the first step, oxygen is separated form air, and pure N₂ is simultaneously left which is easily recovered. In the other step, fuels react with oxides formed in the first step, and at the same time, thermal energy, CO₂ and H₂O are produced. The CO₂ is easily separated from water vapour and captured. There are theoretically no environmentally-unfriendly gases such as CO₂，NO_x and S0₂ discharged in the whole combustion process. A typical nonflame combustion system using Li₂CO₃ + K₂CO₃ + Na₂SO₄ as molten salt system, CH₄ as fuel, CuO as catalyst was experimentally investigated. Experimental results show that the combustion process proceeded as theoretically analyzed, and high concentration CO₂ of 77.0%〜95.0% and N₂ of 91.9%〜99.₃% were obtained. The high concentration of CO₂ is favorable for capturing and storing subsequently. So, the potential of reducing CO₂ emissions of this nonflame combustion technology is huge.