Abstract: In order to investigate the effects of temperature on the aerosol releases of acidic components from heated tobacco products, the types and amounts of acidic components released in the aerosol of three different heated tobacco products at different heating temperatures were analyzed and compared with those of conventional cigarettes. The results showed that: 1) The releases and types of acidic components in mainstream aerosol of the heated tobacco products were lower than those of cigarette smoke, and the releases of acidic components from the different heated tobacco products were significantly different as well. 2) Formic acid, acetic acid and lactic acid accounted for a relatively large proportion of the acidic components in mainstream aerosol of heated tobacco products, their release and migration amounts increased rapidly at the heating temperature of 200-300 ℃, while the increase rates slowed down when the temperature was above 300 ℃. The release and migration amounts of palmitic acid raised sharply at the heating temperature of 200-350 ℃, while the increase rates decelerated when the temperature was higher than 350 ℃. 3) The migration rates of free organic acids in the heated tobacco products correlated to the boiling points of the acids; the higher the boiling points were, the lower the migration amounts of free organic acids would be.