Abstract: In order to investigate the influence of temperature distribution in burning cone of cigarette on the deliveries of seven harmful components in mainstream cigarette smoke, samples of cigarettes wrapped with cigarette paper containing different percentages of combustion improver were puffed, the temperature distribution in the cigarettes and its relationship with the deliveries of seven harmful components in mainstream cigarette smoke were studied, and their correlation models were established. The results showed that:1) The content of combustion improver relatively significantly affected the deliveries of CO, phenol, HCN, NH₃ and NNK in mainstream cigarette smoke with good linear correlations, but less correlated to BaP delivery, and presented no correlation to crotonaldehyde delivery. 2) With the increase of combustion improver content, the maximum temperature in burning cone decreased, while the volume of burning cone increased during puffing. 3) Other than crotonaldehyde, the other six harmful components mainly released from the low temperature zone between 250-300℃ and the high temperature zone of above 650℃. 4) The correlation models between the temperature distribution in burning cone and the deliveries of the said harmful components per puff were established, and the predicted values were significantly linearly correlated with the measured values.