Metal surface coating wastewater recycling system

The utility model discloses a metal surface coating wastewater recycling system which comprises a physicochemical treatment unit, a hydrolysis acidification pool, an MBR pool, a first biological aerated filter, an activated carbon filter, a reverse osmosis system and a second biological aerated filter, and sewage is treated by the physicochemical treatment unit to remove heavy metal ions, phosphate ions and suspended solids in wastewater. Effluent of the physicochemical treatment unit flows into a hydrolytic acidification pool for degradation treatment, effluent of the hydrolytic acidificationpool flows into an MBR pool for purification treatment, effluent of the MBR pool flows into a first biological aerated filter for purification treatment, effluent of the first biological aerated filter flows into an activated carbon filter for residual chlorine removal, and effluent of the second biological aerated filter flows into a second biological aerated filter for residual chlorine removal; effluent of the activat