Cold-rolling wastewater treatment method

The invention discloses a cold-rolling wastewater treatment method comprising the steps of mixing oily wastewater, optical finishing solution wastewater and alkali-containing wastewater in cold-rolling wastewater, performing physical demulsification, chemical demulsification and cooling treatment on mixed wastewater, removing oil and suspended matters in cooled wastewater, and then performing biochemical treatment to obtain first-stage wastewater; performing pre-oxidation on acid-containing wastewater in the cold-rolling wastewater, and then performing neutralization and aeration to obtain second-stage wastewater; performing clarification on the first-stage wastewater and the second-stage wastewater, removing the suspended matters in the clarified wastewater, and performing PH value regulation on the wastewater of which the suspended matters are removed to obtain treatment water reaching emission standards. The cold-rolling wastewater treatment method disclosed by the invention fully uses chemical components