Abstract:In this paper, main polluted rivers in Dongying delta areas have been introduced briefly, and river water quality characteristics and the origin of high ion contents have been analyzed. Choosing 5 river crosssection samples, chemical oxygen demand, copper, lead, magnesium, mercury, six chromium, cadmium, arsenic, cyanide, volatile phenol and oil content have been analyzed. It is found that oil pollution is the most serious. Its standard rate is 100%. River water quality pollution comes mainly from oil extraction and refining. Its pollution loads are respectively 74.85% and 17.36%, and main polluting enterprises are five. Based on these conditons, relative countermeasures are put forward to control water pollution.