Method for comprehensively treating waste liquid from paper-making

This invention discloses a comprehensive treatment method for the paper mill waste water. The said method includes that the waste water of different procedures as well as that of different stages of the same procedure or different combinations are treated with the same or different treatments respectively and the treated water is recovered respectively to be circulated for reuse in corresponding procedures or stages, and then the pulp, the slurry produced after various treatments and the recovered water of paper-making procedures are treated by neutralization by use of acidic material so as to obtain the neutral non-harmful sludge with pH of 7-7.5 used as farm fertilizer after treatment.