Abstract: To study the effect of heating temperature on the dynamic distribution of aerosol from the tobacco section of heated tobacco products, heated tobacco product samples were smoked with the same matched heating apparatus at different heating temperatures. An in-situ aerosol characterization system was used for sampling and on-line detection of aerosol from each detection point in the tobacco section. The dynamic distributions of the main aerosol physical properties formed at 300, 330, and 360 ℃ heating temperatures were investigated during smoking. Furthermore, the temperature fields inside the tobacco section heated at different heating temperatures were characterized by thermocouples to clarify the influence of temperature distribution on aerosol distribution. The results showed that: 1)The particle size of aerosol released from the tobacco section to the cavity section at the three heating temperatures showed approximately normal logarithmic distribution. The particle size and particle number concentration of the aerosol increased with increasing heating temperature. 2)The distributions of count median diameter, particle number concentration, and volume concentration were basically the same at the different heating temperatures. The aerosol with larger count median diameter and higher number concentration and volume concentration was mainly distributed in the middle and front sections near the heating element. 3)The distribution area of larger count median diameter and higher particle number concentration and volume concentration in the tobacco section increased significantly with the increase of heating temperature. 4)The temperature distribution in the tobacco section of the heated tobacco product directly correlated with the aerosol distribution. The higher temperature was conducive to aerosol formation due to the presence of high-concentration vapor components.