Abstract: Calcium-based thermochemical energy storage technology utilizes reversible reactions （namely, CaO/CaCO₃ and CaO/Ca(OH)₂ systems）, to achieve efficient thermal energy storage and release. This technology can be integrated with solar thermal energy to drive the calcination reaction for heat storage, while the carbonation exothermic reaction provides high-temperature heat during peak electricity demand for power generation. This effectively mitigates the intermittency of solar energy and promotes the operational flexibility and power generation capacity of power plants. With advantages such as wide availability of raw materials, low cost, and high energy storage density, calcium-based thermochemical energy storage is regarded as a highly promising large-scale thermal energy storage technology. calcium-based materials are susceptible to sintering-induced deactivation and mechanical wear during long-term cycling, a problem exacerbated under solar irradiation conditions. Additionally, challenges exist in reactor structural design and system integration optimization. This paper systematically reviews recent advances in the integration of calcium-based thermochemical energy storage with concentrated solar power generation. It focuses on three critical areas: modification of energy storage materials, development of directly and indirectly irradiated reactors for solar thermal applications, and thermodynamic optimization of solar-driven calcium looping systems. The review summarizes key research efforts, identifies major technical bottlenecks, and outlines promising future research directions.