The paper studied the characteristics of water pollution in Luanhe-Tianjin water diversion and analyzed the influence of the pollutants such as suspended matter, total nitrogen, total phosphorus on the water quality of Yuqiao reservoir.The result showed that the main nutrition elements that affect the water environment of Yuqiao reservoir are total nitrogen and total phosphorus witch come from the upstream reservoir of Luanhe-Tianjin water diversion project.The content of Suspended matter and heavy metals is large in water body along the line of Luanhe-Tianjin witch mainly comes from the sides of the tailings, but the deposit amount is greater before entering Yuqiao reservoir and little influence on reservoir water environment. According to the conclusion of the study, the paper put forward some suggestion for water environment management alonge Luanhe-Tianjin water diversion project and Yuqiao reservoir.