The calcium looping thermochemical thermal energy storage is one of the best high-temperature heat storage schemes for 3th concentrating solar power photothermal power, but its application is restricted by the inherent low solar absorptance and poor cyclic stability of CaCO3/CaO. Herein, the solar absorptance of CaCO3 particles is enhanced by doping Mn-Fe oxides, meanwhile, awns of setaria faberis and microcrystalline cellulose are used as bio-templates to generate pores inside the particles. The test results show that the prepared particles possess adequate anti-crushing strength, high cyclic stability, high solar absorption, and high carbonation rate. In addition, the carbonation kinetic equation of the composite porous particles is studied with the influence factors such as CO2 partial pressure, reaction temperature, and particle morphology taken into consideration. is of great significance for the design and regulation of the carbonator achieving highly stable heat output in the CaL thermochemical heat storage system.