Abstract: The light rare earth element（REEs） contents in the blood, food， urine and feces of human bodies were determined by ICP-MS. All the samples were obtained from healthy adult men who lived in the four areas (Chengdu, Taiyuan, Tianjin and Zhenjiang) with different dietary patterns in China. All the individual samples were digested by mixed acid and determined by ICP-MS. Descending order of the light REEs concentrations were in feces, food, blood and urine. There was no significant difference on concentrations of the samples among the four cities. And the distribution pattern of the light REEs in blood, food and feces were similar to that in the nature, while the Sm in the urine was abnormal（REEs）.