根据对秦皇岛市新开河口实地采集水样 ,进行了重金属、总氮和总磷含量分析 ,发现新开河口水污染严重 ,多超过地表水IV类标准 ,主要污染物为氮、磷和油类 ,其他污染物含量均在II类标准以内 ,河口水体中氮、磷含量均达到水体富营养化危险负荷 ,可见陆源污染是秦皇岛近岸海域富营养化日趋严重、赤潮日趋增多的主要原因 Based on the field sampling of Qinkaidao Xinkaihe River, heavy metals, total nitrogen and total phosphorus were analyzed. It was found that Xinkaihe Estuary was seriously polluted by water and more than Grade IV standard of surface water. The main pollutants were nitrogen, phosphorus and oil , And other pollutants were all within the Class II standard. The nitrogen and phosphorus contents in the estuaries reached the dangerous load of eutrophication. The main reason that the terrestrial pollution was the eutrophication in the coastal waters of Qinhuangdao and the red tide increased day by day