The invention belongs to the technical field of extraction and separation of flavone and polysaccharide active ingredients in plants, and particularly relates to an extraction liquid for synchronously extracting flavone and polysaccharide of taxus chinensis and a method thereof. The method comprises the following steps of using crushed branches and leaves of taxus chinensis as raw material; under the synergetic action of ultrasonic wave and microwave, extracting and separating flavone and polysaccharide by a novel double-water phase system which is built by ionic liquid, inorganic salt and water; extracting and separating a flavone compound from an upper ionic liquid phase by an organic solvent, and recycling the ionic liquid and the organic solvent; obtaining a polysaccharide compound from a lower inorganic salt water phase by dialysis, and alcohol precipitation. The method has the advantages that the extraction efficiency is high, the separation condition is moderate, the green and environment-friendly effects of extracting solvent are realized, the recycling degree is high, and the like; the method is suitable for industrialized synchronous separation of flavone and polysaccharide compounds.