Triclocarban　(TCC)　is　in　great　market　demand　especially　after　the　outbreak　of　COVID-19　pandemic,　becoming　an　emerging　pollutant.　However,　the　impacts　of　TCC　on　the　performance　of　nitrifying　granular　sludge　system　and　the　occurrence　of　antibiotic　resistance　genes　(ARGs)　were　still　unknown.　This　work　explored　the　impacts　of　different　concentrations　of　TCC　on　nitrifying　granular　sludge.　Results　showed　that　TCC　suppressed　the　activities　of　ammonia-oxidizing　microorganisms　and　decreased　the　abundance　of　Nitrospira.　Adsorption　was　the　main　way　for　the　removal　of　TCC　and　the　biodegradation　efficiency　of　TCC　increased　to　28.00%　under　19.70　mg/L　TCC　addition.　TCC　enriched　the　ARGs　and　promoted　the　risks　of　their　transferring　in　microorganisms.　Pseudomonas　might　not　only　have　strong　resistance　to　TCC,　but　also　propagate　ARGs.　The　removal　process　of　TCC　and　bacterial　communities　were　important　factors　to　promote　the　spread　of　ARGs.　Thus,　the　existence　of　TCC　presented　a　great　environmental　risk.