The design and treatment capacity of a sewage treatment plant is 10 kt/d, and the treatment ratio of domestic sewage with "physical chemical + biochemical + physical" combination process is about 1∶1. The operation results show that after treatment, the sewage is treated. The average discharge COD is 35.36 mg/L, the average removal rate of COD is 96%, the average removal rate of NH3-N is 99.4%, the average intake concentration is 31.25 mg/L, and the average outflow concentration is 0.079 mg / L, the average removal rate of TP is 94%, the average intake concentration is 1.17 mg/L, the average outflow concentration is 0.05 mg/L, the average removal rate of TN is 94.2%, and the average intake concentration is 58 mg/L, The average discharge concentration was 3.2 mg/L. The effluent  met the specified category I emission criteria.