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This study evaluated the removal of multiple pollutants, i.e., polybrominated diphenyl ethers (PBDEs), novel halogenated flame retardants (HFRs), sulfonamide antibiotics (SAs), and heavy metals (HMs), by a full-scale reversed A2/O process in a sewage treatment plant (STP) in Guangzhou, China. The reversed A2/O process demonstrated high removal efficiencies (REs) for total PBDEs (60.5％± 4.3％), novel HFRs (98.4％± 2.8％) and HMs (70.1％± 1.2％), and a relatively low RE for SAs (25.0％± 2.3％). BDE 209, the dominant PBDE congener, showed a high residual concentration (13.41 ± 5.18 ng/L) in the suspended particulate matter (SPM) of treated effluents. Some novel HFRs, dechlorane plus (DP) and decabromodiphenyl ethane (DBDPE), were detected in the SPM of the raw sewage (7.50 ± 4.14 ng/L and 11.52 ± 11.65 ng/L, respectively). The removal of SAs was mainly through biodegradation in the activated sludge bioreactors (ASBs). Of the HMs, Mn and Ni exhibited the lowest REs (47.5％± 2.2％and 35.0％± 2.6％, respectively), while Cr and Cu showed the highest removal (REs>80％). In terms of treatment units in the reversed A2/O process, ASBs showed the highest RE (27.8％) for the multiple pollutants. The information can aid in our understanding of removal properties of STPs on various pollutants and evaluating the ecological/health risks of STPs as point pollutant sources.