Abstract:For more than a decade, with the fast development of social economy and the acceleration of urbanization process in China, the urban water pollution is worsening and the urban water environment continues to worsen. In the suburban fringe, especially in the villages in the city, the vast majority of rivers are seriously polluted, the surface water quality is generally inferior to class V standard and some bodies of water even appear the black-odor phenomenon. Mazhang River is a typical channel of this kind. By analyzing the black-odor causes of Mazhang River, the existing problems are found out, and the treatment countermeasures to eliminate the black-odor river are put forward. A new look of Mazhang River is taken on after treated.