Abstract: Surveys were conducted on point pollution source and nonpoint pollution source in Daye city，total amount of pollutants into the river was checked with using the method of pollutants producing coefficient，indirect estimation，and correction of source intensity coefficient. The purpose was to understand the situation of pollution source of water environment in Daye City. The results indicated that the harm of nonpoint pollution source was equal to point pollution source approximately. The local sewage treatment rate is low. Livestock breeding and agricultural runoff pollution had not been controlled effectively. The countermeasures of water environmental protection were suggested on the basis of the results. Firstly，the controlling of nonpoint source pollution need to be treated seriously. Secondly，the construction of environmental protection infrastructure need to be strengthen. Finally，to adjust the industrial structure，and realize the mineral economic transition.

Key words: Daye City, pollution source, pollution of water environment, amount into river, mineral economic transition