Taking nitrogen, phosphorus, lead, chromium and copper as analysis indexes, the water quality of Jihe River and subsidence water was evaluated with the comprehensive water quality identification index evaluation model. The results showed that nitrogen and phosphorus in Jihe River and subsidence waters were mainly affected by the surrounding non-point source. From October 2019 to June 2020, the contents of TN and NH3-N increased with time. In the rainy season, the maximum values of TN in subsidence waters and Jihe River were 5.55mg/L and 6.33mg/L, respectively,and the maximum values of NH3-N were 1.27mg/L and 1.42mg/L, respectively. The contents of Cu, Zn and Pb in the subsidence waters were higher than those in Jihe River. The flow of Jihe River improved the water quality of the subsidence waters. Affected by precipitation and the water exchange with Jihe river, the water quality of the subsidence waters fluctuated greatly in rainy season. The water quality of Jihe River and subsidence waters meets the requirements of class IV in environmental quality standards for surface water (GB 3838—2002).