The invention belongs to the field of extraction of flavonoids and particularly relates to a method for extracting butein from Kunlun chrysanthemums. The method comprises the steps of crushing air-dried Kunlun chrysanthemums, which serve as a raw material, then, carrying out extraction with an alcoholic solvent, then, carrying out adsorption with macroporous resin, carrying out eluting with a mixed solvent, and then, carrying out crystallizing, washing and drying, thereby obtaining the butein with relatively high purity. The method has the advantages of simplicity in operation, short time, high extraction ratio, high product purity and the like.