The efficient recycling of waste heat resources of sinter is one of the important measures for iron and steel enterprises to achieve the goal of “double carbon”，but the cooling process of sinter in the bed directly affects the quality and waste heat recovery effect of the outlet heat carrier. Based on this，the gas flow and gas-solid heat transfer model in the vertical tank are established based on the porous medium theory and the local non-thermodynamic equilibrium dual-energy equation，and the influence of key operating parameters of the vertical tank such as sinter inlet temperature，cooling air flow and inlet temperature on the sintering cooling process in the bed is studied in detail. The results show that with the increase of sinter inlet temperature， cooling air flow and inlet temperature， the airflow pressure increases. The cooling air outlet temperature exergy and net exergy increase first and then decrease with the increase of cooling air flow，and gradually increase with the increase of sinter and cooling air inlet temperature. The exergy efficiency first increases and then decreases with the increase of cooling air flow and inlet temperature. The increase of sinter inlet temperature will lead to a decrease in exergy efficiency. Under the premise of meeting the discharge temperature，the air inlet temperature should be increased as much as possible，and by setting the sinter inlet temperature and air inlet flow，the vertical tank can obtain greater air net exergy and exergy efficiency.