Driven by the global energy transition and China's dual?carbon goals, clean and efficient utilization of carbonaceous energy has emerged as a core research hotspot in the energy field. Chemical looping gasification (CLG) technology, characterized by low carbon capture cost, high energy conversion efficiency and minimal pollutant emissions, offers a promising route for converting carbonaceous fuels into high?value syngas. This paper focuses on the application of chemical looping technology in syngas production from carbon?containing energy sources. It reviews the research progress in this field, compares it with conventional gasification processes, and summarizes the reaction mechanisms of chemical looping gasification and oxygen carriers. Compared with conventional processes, the unique advantages of syngas production by chemical looping technology are analyzed: the carbon conversion rate of coal chemical looping gasification is as high as 83.79%; the H₂/CO volume ratio of petroleum coke chemical looping gasification is approximately 5 times that of conventional gasification, and it can also achieve CO₂ capture; biomass chemical looping gasification can be realized at a relatively low temperature and can produce pure H₂ without gas separation.