Abstract: Zero-carbon fuel substitution and CO₂ capture will play a crucial role in the decarbonization of cement plants. This paper proposes an integration scheme that combines the calcium looping process with the chemical looping hydrogen generation process （CaL-CLHG）. The CaL-CLHG scheme offers the advantage of recovering waste heat from the cement production process for hydrogen generation. Besides, the CaL-CLHG scheme avoids the power consumption associated with air separation in the traditional calcium looping process （CaL-Oxy）. Results indicate that the specific primary energy consumption for CO₂ avoided can be achieved at 2.68 GJ/t in the CaL-CLHG scheme. This represents a reduction of 33.5% compared to the CaL-Oxy scheme. Economic analysis indicates that the cost of CO₂ avoided can be reduced from 56.6 /t in the CaL-Oxy scheme to the range of 34.2-41.6 /t in the CaL-CLHG scheme. In conclusion, adopting the CaL-CLHG process for the decarbonization of existing cement plants presents a techno-economically feasible option.