The invention discloses a synthetic processing method of hydroxyethylidene (HEDP) pre-plated copper waste water. The method essentially comprises the following steps of: taking a certian quantity of waste iron filings and waste steel fillings and mixing; dipping with alkali liquor; washing with water after degreasing; removing oxide on the surfaces of the waste iron filings and the waste steel fillings by being dipped in acid to be standby; adjusting the pH value of the hydroxyethylidene (HEDP) pre-plated copper waste water to be 1.8-2.5; adding with activated mixed iron filings into the HEDPpre-plated copper waste water, wherein adding quantity is 7-30% of the quality of the waste water; after aeration reaction for 0.5-2 hours, water exiting and adding with polyacrylamide (PAM) to be deposited in a flocculation way; and finally adding with lime cream into deposited liquid supernatant, adjusting the pH value to be 11-12, reacting for 5-20 min, adding with the PAM to be deposited in aflocculation way, water exiting, and adjusting the pH value thereof to be discharged or recycled after reaching the standard. The method has simple technology, convenient operation and good processing effect.