Abstract：Literatures on Cd concentrations between 2000~2010 in different diets of China were reviewed and concentrations of Cd in the main diets of Chinese were calculated statistically based on that. In combination of the total dietary survey carried out in 2000, the dietary Cd exposure of people in different regions was computed and the screening value of Cd was derived. The results revealed that dietary Cd intake of Chinese people was below the provisional tolerable value 0.833μg/(kg BW?d) issued by FAO/WHO(Food and Agriculture Organization/World Health Organization). And the national average dietary Cd intake was 0.444μg/(kg BW?d), which was higher than the one of north [0.240μg/(kg BW?d)], Beijing [0.160μg/(kg BW?d)] and Shanghai [0.408μg/(kg BW?d)], but lower than the one of south [0.518μg/(kg BW?d)]. Vegetables, cereal and its products, flour and its products, aquatic products and meat were the main diets contributed to dietary Cd intake in nationwide, northern and southern areas. Butin Beijing it was attributed to vegetables, flour and its products, fruits, cereal and its products and aquatic products and in Shanghai it was attributed to vegetables, aquatic products, cereal and its products and meat. The derived screen values were lower than the one when dietary Cd intake was not considered (829mg/kg), and the value for nationwide, north, south, Beijing and Shanghai was 461, 630, 400, 697 and 492mg/kg, respectively.The difference among the derived values of different scales based on it corresponding dietary Cd intake was obvious, and the value of south was 86.8% of the one at national scale while the one of north, Beijing andShanghai was 1.4, 1.5 and 1.1times of it, respectively. Therefore, the different dietary Cd exposure characteristic in different regions should be taken into account when the national screening value of Cd is to assure its rationality.
