The invention discloses a method for separating cynomorium songaricum polysaccharides through deep-eutectic solvent/salt two-aqueous-phase extraction. The method comprises the following main steps: adding a deep-eutectic solvent with a certain moisture content into cynomorium songaricum powder, fully leaching at room temperature, performing ultrasonic pulse treatment under ice-bath conditions, andcentrifuging to collect the supernatant so as to obtain a crude cynomorium songaricum polysaccharide extract; adding dipotassium phosphate into the crude cynomorium songaricum polysaccharide extract,mixing, dissolving, standing and centrifuging to form a two-aqueous-phase extraction system, wherein the upper phase is the deep-eutectic solvent, and the lower phase is a solution containing sugar and dipotassium phosphate; performing freeze drying recovery on the upper phase; and dialyzing the lower phase, and performing freeze drying, thereby obtaining the cynomorium songaricum polysaccharide.The deep-eutectic solvent adopted in the invention has the advantages of being non-toxic, excellent in biodegradability and biocompatibility and low in melting point, the extraction, separation and purification operations are simple, the conditions are mild, the separation efficiency is high, the yield of the cynomorium songaricum polysaccharide is high, the deep-eutectic solvent can be recycled,the production cost is effectively reduced, and the method is suitable for large-scale industrial production.