The invention relates to a treatment method of waste papermaking water, which comprises the steps of filtration, UPCB treatment, biochemical treatment and deep treatment. Because the UPCB process is adopted in the treatment method of the invention, the waste water treatment cost is greatly reduced, the waste water treatment efficiency is effectively improved, and the whole technical process is simple and can be implemented easily. The method of the invention can be used for treating various kinds of waste papermaking water, particularly the middle section waste water with high load, and in addition, satisfactory results can be obtained. The treated waste water can reach the national specified discharge standard.