Method for extracting and refining carthamin yellow

The invention provides a method for extracting and refining carthamin yellow. The method takes a precipitate which is separated out in an alcohol precipitation step during production of a safflower injection as a raw material and comprises the steps of filtration, ultrafiltration, macroporous adsorption resin separation, drying and the like to prepare high-quality carthamin yellow. The method has the following advantages: (1) the used raw material is low in cost; (2) the process is simple; (3) the production efficiency is high; and (4) the pollution caused by wastes to the environment can be prevented.