Abstract: The current status of regenerated water reuse for circulating cooling system both at home and abroad was reviewed. The mechanisms of corrosion in this process due to turbidity, organism, ammonia-nitrogen, chloride ions and sulfate radical were analyzed. Deep treatment methods for the regenerated water reused for circulated cooling system were concluded, and the applicable conditions, construction cost and operation cost of different methods compared. Finally, related standards and concentration limits of various impact factors were discussed and the broad application prospect of regenerated water reused for circulating cooling system expounded.