The utility model relates to a waste water integrated treatment field especially relates to the desulfurization waste water advanced treatment device of power plant, produce the water tank including the preliminary treatment, tubular ultrafiltration membrane group spare, receive and strain branch salt processing apparatus, the formula of book high pressure membrane treatment equipment, machinery vapour pressure recompression crystallization subassembly, it still transfers water saving box including preliminary sedimentation and quality of water between water tank and the tubular ultrafiltration membrane group spare wherein to produce in the preliminary treatment, first medicament reaction box, sedimentation water box, second medicament reaction box, thick water tank, through the pipeline intercommunication between each device, and receive and strain branch salt processing apparatus and strain the former water tank of branch salt and become with nanofiltration membrane set by receiving,the filter membrane and receiving received is strained and is formed circulation pipeline through the pipeline between the former water tank of branch salt. Can effectively realize the advanced treatment of power plant's desulfurization waste water, the chlorion is effectively held back, sulfate radical desorption rate high, and the whole rate of recovery of waste water softening agent enrichingstage is greater than 80%, really realizes the zero release.