Abstract: According to the basic data of water environment quality monitoring sections of 16 rivers and lakes in Wenshan Prefecture in 2019,the annual average values of water quality monitoring data of these sections all meet the water quality assessment objectives. However,the monthly water quality monitoring data of five sections have exceeded the standard,and the monthly water quality monitoring data of other sections all meet the water quality assessment objectives. According to the evaluation method of water environment carrying capacity（ Trial）,combined with the annual and monthly monitoring data,the time standard rate of water quality A₁ was 94. 79%,the spatial standard rate of water quality A₂ was 100%,and the water environmental carrying capacity index R_C of Wenshan Prefecture was 97. 40%.