Based on the water quality monitoring data of 16 black-odor rivers in the main urban area of Yangzhou from January to September 2020, control effect and existing problems of black-odor rivers were analyzed. The results showed that after dredging and aerating, the transparency and dissolved oxygen concentration of each river were significantly improved, with the average values of 48 cm and 6.6 mg/L, respectively. The redox potential and ammonia nitrogen concentration fluctuated greatly, ranging from -105 to 238 MV and 0.123 to 19.4 mg/L, respectively.