The invention discloses a method for treating coking nanofiltration concentrated water and especially high-conductivity wastewater. Coking nanofiltration concentrated water is sequentially treated by a pH regulation aeration tank, treated by an anoxic SBR (sequencing batch reactor) bioreactor process, treated by an aerobic-anoxic-aerobic SBR bioreactor process, and finally subjected to a coagulative precipitation process. The SBR main reaction tank in the anoxic SBR bioreactor process mainly adopts an influent-anoxic-precipitation drainage-idling operating mode, and the aerobic-anoxic-aerobic SBR bioreactor main reaction tank mainly adopts an influent-aerobic aeration-anoxic stirring-aerobic aeration-precipitation drainage-idling operating mode. The coking nanofiltration concentrated water treatment system has the advantages of low on-time investment, stable wastewater treatment effect, low production operating cost and high automation degree, and is simple to operate. The quality of the nanofiltration concentrated water effluent completely reaches the requirements for national discharge standard.