Fossil fuel combustion emits large amounts of CO2,and carbon capture,utilization and storage (CCUS) is currently the only emission reduction technology that can realize large-scale low-carbon utilization of fossil energy. Chemical looping combustion (CLC) is a recently developed decoupled combustion technology,which can realize in situ carbon capture during combustion. Oxygen carrier is one of key component for developing and optimizing of the CLC technology. Calcium-based oxygen carriers have potential applications due to their unique characteristics of high oxygen loading capacity,low cost,wide availability and environment benign. The principles and development of chemical looping combustion technology,as well as six common types of oxygen carriers,were summarized. The bottleneck problem of calcium-based oxygen carriers,which are difficult to match the appropriate thermodynamic and kinetic temperature and partial pressure zones,were emphatically introduced. In this paper,the relevant researches on the regulation of reaction process by controlling reaction conditions and additives at home and abroad were summarized,and the strengthening effect and influence mechanism of inert carriers,metal oxides and other additives on the performance of calcium based oxygen carriers were analyzed. It has been demonstrated that inert carriers can be effective in improving the dispersion characteristics of the oxygen carriers,thereby increasing reactivity,and contributing to mechanical strength. In comparison to inert carriers,the addition of metal oxides is likely to be more effective. However,in terms of current research progress,traditional functional strengthening methods can improve the performance of oxygen carriers to a degree,but it is difficult to fundamentally breaking the bottleneck of poor regenerative properties. Future research can focus on two aspects to address this issue:utilizing artificial intelligence in materials science,targeted screening and optimization of inexpensive calcium-based natural ores/industrial solid waste materials as oxygen carriers，reconstructing the morphological structure and crystal structure of oxygen carriers to regulate the migration and transformation behavior of oxygen and sulphur atoms,so as to reduce the carrying effect of oxygen transfer on sulfur atoms and achieve regeneration performance enhancement.