Abstract: The engineering-scale full flowsheet technology of coal-based CCUS is a pivotal component of the technology system for efficient， clean coal utilization and carbon emission reduction. It represents a critical and urgent requirement for achieving China’s energy security and the “Dual Carbon” strategic goals. Based on the authors’prior research， this paper reviews the current development status of the full flowsheet coal-based CCUS technology， reveals its integration mechanisms， explores and establishes deployment models and strategies for CCUS clusters in coal energy bases ， and discusses future development directions and associated technical challenges. Progress: (1) Low-energy-consumption and highly adaptable coal-based CO₂ capture， safe and efficient geological storage of CO₂ in coal seams， and sufficient， economically feasible CO₂ utilization in coal mining areas constitute the key links in the engineering-scale full flowsheet coal-based CCUS technology. The integration of this full flowsheet technology is driven by the coupled control of source-sink matching mechanisms， technical parameter matching mechanisms， and system optimization mechanisms. The source-sink matching mechanism realizes the physical linkage of coal-based CO₂ capture， geological storage， and utilization facilities through multidimensional， constraint-based path optimization. The technical parameter matching mechanism ensures the stable operation of physically connected facilities and the construction of technical chain parameters through coordinated design of key end-to-end operational parameters across capture ， storage ， and utilization. The system optimization mechanism enables the dynamic optimization of the technical chain and the construction of optimal system configurations through big data platforms， optimization models， and intelligent algorithms. These mechanisms exhibit strong interdependencies and mutual feedback relationships. (2) The full flowsheet coal-based CCUS technology model is characterized by “CO₂ capture from coal-fired or coal chemical industrial sources， geological storage in coal-bearing basins or coal seams， and CO₂ utilization in coal mining areas,” and is implemented in the form of CCUS clusters in coal energy bases. Representative large-scale coal base CCUS clusters in the Junggar Basin and the Ordos Basin will provide critical technological support for the low-carbon， high-quality development of China’s coal industry. Outlook: The mainstream direction for the development of full flowsheet coal-based CCUS technology lies in the deployment of large-scale CCUS clusters in coal bases， centered on integrated systems comprising low-cost CO₂ capture， safe and efficient geological storage in deep coalbed methane (CBM) or coal-measure gas-depleted reservoirs within coal-bearing basins， and high-value comprehensive utilization of CO₂ in mining areas. Technologies such as ECBM storage driven by coal chemical tail gas， ECBM storage utilizing oxy-fuel combustion flue gas， efficient CO₂ capture and large-scale conversion/utilization for peak-shaving coal power in new energy bases ， and CO₂ capture from coal-fired power bases coupled with carbon and energy storage in abandoned mine goafs are anticipated to become key expansion directions for the full flowsheet coal-based CCUS technology.