Abstract: In order to further systematically improve the ecological environment of the mining area， the Qingyang dolomite mine area has carried out the transformation project of rainwater and sewage diver⁃ sion. The main scheme of drainage system transformation includes taking the original combined channel as a rainwater channel，collecting rainwater to the rainwater pool for recycling，and discharging the part which meet standard excess.A new production water treatment system is built，the production water channels that were originally discharged into the rain drain are cut off ，and all the production water channels are changed to the newly built production water treatment system. Two new buried domestic sewage treatment facilities are built to treat domestic sewage. After the transformation，the drainage capacity of Qingyang Mine has been improved，the problem of water logging in the rainy season of the area has been alleviated，and the working environment and living environment of the mining area have been improved. The reuse rate of cir⁃ culating water in the mining area is as high as 96.49%，saving about 100 000 m3 of water every year. It re⁃ duces the difficulty of environmental protection management in the mining area，comprehensively uses ex⁃ cess rainwater during the rainy season，and saves manpower and material resources.

Key words: diversion of rainwater and sewage, utilization of water resources, drainage facilities