The utility model discloses a device for concentrating and separating saline wastewater. The device for concentrating and separating the saline wastewater is characterized by comprising a tower body, wherein an air outlet is formed in the top of the tower body, the tower body is divided into an upper layer and a lower layer by virtue of a tower plate, a high temperature saline water inlet is formed in the middle upper part of the lower layer, the high temperature saline water inlet is communicated with a spraying device in the tower body, a concentrated saline water collecting hole is formed in the lower part of the lower layer, an air inlet is formed the high temperature saline water inlet and the concentrated saline water collecting hole, and the air is supplied to the air inlet by virtue of a fan; a cold water inlet is formed in the upper part of the upper layer, the cold water inlet is communicated with a cold water spraying pipe in the tower body, and a cooling water outlet is formed in the lower part of the upper layer of the tower body; an upper air hole is formed in the tower plate, and a bubble cap covers the upper air hole. The device for concentrating and separating the saline wastewater has the advantages that a spiral solid conical sprayer is adopted, high-efficiency atomization of high saline water and condensed water can be realized, contact area between the air and the high saline water is increased, and mass transfer efficiency and heat exchange efficiency are improved.