After bio-treatment and coagulation of coking wastewater, the effluent still contains some non-biodegradable organics, and the COD concentration is about(85±20) mg·L-1, which would contaminate the water environment and cause difficulties in water reusing. To realize the further reduction of organic and the harm to environment, advanced treatment of bio-treated coking effluent was carried out by using ozone-fluidized bed and the composition was analyzed with three-dimensional fluorescence excitation-emission...