Ecological restoration is a principal intervention for reactivating and enhancing the carbonate weathering carbon sink in degraded karst landscapes. This review synthesizes the current understanding of this process by examining four interconnected domains: mechanisms, controls, system comparisons, and quantification. First, it details the mechanisms by which restoration enhances weathering, encompassing chemical dissolution (via elevated soil CO2), biotic mediation (through root exudates and microbial activity), and physical-chemical coupling (driven by hydrologic cycle-mediated fracture propagation). Second, it analyzes the hierarchy of controlling factors-climate, vegetation, soil properties, anthropogenic inputs, and hydrogeology-that govern the magnitude of the resultant carbon sink. Third, it examines evidence comparing restored and natural karst ecosystems, which indicates that restoration often establishes a distinct biogeochemical state characterized by unique process intensities, isotopic signatures, and environmental sensitivities, rather than replicating a natural baseline. Fourth, the review evaluates methodological approaches for quantifying this enhanced sink, including mass-balance calculations, isotopic tracing (delta 13C, Delta 14C), remote sensing/GIS integration, and process-based critical zone modeling, and discusses their integration for robust, spatially explicit flux estimation. Building on this synthesis, the review outlines resultant management implications and identifies key research priorities, such as resolving long-term sink dynamics and defining functional benchmarks for restored systems. The collective evidence demonstrates that ecological restoration shifts the dominant regime of karst weathering from one governed primarily by climate to a synergistic system where biological processes play a major role, thereby significantly increasing the potential for CO2sequestration, albeit within a novel, managed ecosystem framework.