Abstract: The methods for reusing reverse osmosis (RO) concentrates are introduced. The principles, characteristics and application are summarized. The paper focuses on the removal of supersaturation of RO concentrates to get high water recovery, membrane distillation technique to recovery RO concentrates， disposal of wastewater RO concentrates and production of salts from seawater RO concentrates. Considerable economic and environmental benefits could be achieved by reusing of RO concentrates.