Advanced treatment method for waste water

The invention belongs to the field of advanced treatment of waste water. Primary treatment of the waste water is allowed to carry out, so that primary treatment water is obtained, the primary treatment water passes through a pretreatment unit and a membrane treatment unit, so that produced water is obtained, partial nanofiltration and/or reverse osmosis concentrated water and partial microfiltration and/or ultrafiltration backwash discharge water return to the pretreatment unit and pass through the pretreatment unit, and microfiltration and/or ultrafiltration are allowed to carry out, so that secondary treatment water is obtained. Partial secondary treatment water merges with the produced water to obtain reuse water, and the utilization rate of water is improved under the conditions that the recovery rates of the nanofiltration and reverse osmosis are not improved. The secondary treatment water without merging with the produced water merges with the unreturned water to obtain secondary merging water, which ca