The mercury content of cultivated land in Guizhou is higher than other provinces in China. An investigation of the total mercury concentration of rice in Guizhou and human health risk assessment was done for the high level of mercury in agricultural soil of Guizhou. This result can provide a scientific basis for food risk inspection management in Guizhou. The samples were detected from 9 zones in Guizhou,and all the samples were local rice. The mercury concentration in rice was detected by the atomic fluorescence spectrometry according to GB/T 5009.17-2003,and the U. S. EPA's health risk assessment model was used in the research. The results indicate that a maximum of 0. 024 4 mg / kg in the rice samples can be detected,and the exceeding rate is 4.85%,and no mercury can be found in 22 samples. Personal lifetime risk coefficient of mercury health hazard is 1.97 × 10- 3,which belongs to the first level risk( slight risk). It poses no risk to the exposure population.
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