Carbon dioxide capturing agent and application thereof

The invention discloses a carbon dioxide capturing agent and application thereof. Waste concrete is taken as a raw material, after primary cutting, pre-burning and vibration smashing, after vibrationseparating, the waste concrete is sieved through a 60 mesh-325 mesh sieve, sieved subparticles are collected and subjected to grinding treatment, and the carbon dioxide capturing agent is obtained. The prepared CO2 capturing agent is high in speed of absorbing carbon dioxide, short in reaction time, simple in operation, high in technology adaptability and capable of being widely applied to wet ordry carbon capturing. According to the agent, the high added value of hardened gel and the utilization efficiency of waste concrete are improved, the new material with wide sources and low cost is provided for carbon dioxide capturing agents of industrial gas, and the green and environmentally friendly new material meeting the national related supporting policies is provided, can be used for capturing carbon dioxide in smo