Abstract: This paper summarizes the situation of mercury pollution in Shanghai, China. The average content of mercury in Huangpu River is apparently high. The distribution of mercury in water and sediments is consistence with that of industry and agriculture, characteristic of wave change. Mercury content is highest in middle reach, and lowest in upper reach, and middle in lower reach. Corresponding to mercury distribution in the river, mercury distribution in sediments is in accordance with deposition dynamics of sediment. Positions with high mercury in sediments are located relatively in downstream of positions with high mercury in water. The amount of mercury exported to the Yangtze River from the Huangpu River is increasing year after year. The baseline of mercury is also high in soils. High baselines of environmental pollutions are related with the long history of industries in this area. They are harmful to human health with properties of low dose and long time exposure. It is now hard to control and manage. With the economy development, centers of banking, business, and trade are emerging in central district of Shanghai and a worldwide production base is forming around Shanghai. The new distribution of economy will change the environmental situation of Mouth of Yangtze River and near East Sea. Based on the analysis of economy effect on environmental record，this paper emphasizes the necessary to study the environmental pollution in Mouth of Yangtze River and coastal water.

Key words: Shanghai, economy distribution, Mouth of Yangtze River, mercury.