Abstract: An experimental setup was provided to investigate the cooling process of sinter and relevant influencing factors on the process. The results showed that the cooling air flowrate and thickness of sinter bed are both the main factors. With the thickness of sinter bed kept unchanged and increasing cooling air flowrate, the temperature of hot air passing through the sinter bed decreases gradually, while the sensible heat of hot air begins to increase and comes up to its peak value, then decreases gradually. It implies that there is an appropriate value at which the hot air carries maximum. Moreover, keeping up the opening of air-blower constant, the hot air temperature increases gradually with the increasing thickness of sinter bed, and there is an appropriate value of the thickness, too. The appropriate thickness and appropriate cooling air flowrate affect and constrain mutually.