Abstract:In order to investigate impact of mercury mining activity on local ecological environment, soil and agricultural products around mercury mining area in Guizhou, 60 soil samples and 60 agricultural products samples were collected by random sampling to evaluate pollution degree of heavy metals in soil by Nemerow comprehensive index method and potential ecological risk assessment method, and population""s exposure to heavy metals in agricultural products by health risk assessment model. The results show that pollution degree of soil in study area is heavy pollution; Hg shows the highest contribution factor in soil, followed by Cd, and soil pollution in Area A is more serious than that in Area B. Over standard rate of Hg in samples of vegetables, rice and corn is 82.8%, 46.7% and 20%, respectively, followed by 51.7% samples of Cd in vegetables, and other elements do not exceed limit standard in food. Health hazard index (HI>1) of rice and vegetables may have health risk, but corn is safe. There is no obvious linear relationship between heavy metal content in soil and edible part of agricultural products.