The utility model relates to a treatment system for a nanofiltration and reverse-osmosis concentrated solution, belonging to the field of wastewater treatment. The system comprises ozone reaction equipment and a biological aerated filter, wherein the ozone reaction equipment is connected with the biological aerated filter. According to the system, after ozone of the ozone reaction equipment is used to remove partial organic matters to improve the biodegradability of the wastewater, the wastewater is introduced into the biological aerated filter which is used to remove most organic matters in the wastewater, and then the treated wastewater is discharged in an up-to-standard manner. The treatment system disclosed by the utility model has the advantages of simple structure, good treatment effect and low cost.