The invention discloses a disposing method of organic can manufacturing industrial waste water, which comprises the following steps: filtering acid groove water without solid material in the organic can manufacturing course; dividing filtrate into two parts with one part reducing draining quantity and acid quantity to improve pectin content in the waste water and the other part neutralized to 4.5-5.0 pH; adding aluminum sulfate to enrich pectin; utilizing acid ethanol to relocate and neutralize through alkaline alcohol; washing through waterless alcohol; drying at 50-60 deg.c in the vacuum environment; grinding through 100 order to produce pectin. The invention reduces discharging load of terminal waste water, which decreases CODcr by over 50 percent.