The invention discloses a method for extracting anthoxanthin from banana skin. The method comprises the following steps: raw material pretreatment, enzymolysis, water bath extraction, clarification, adsorption, concentration, freeze drying and conservation. The invention adopts a water bath extracting and big hole resin adsorbing combined method after enzymolysis for extracting anthoxanthin in the banana skin, and the obtained anthoxanthin extractive is tan, is higher in content and purity, is better in quality and conforms to Food Sanitation Standards. The anthoxanthin can improve the blood circulation of people, reduce cholesterol and lower the sickness rate of cardio-cerebrovascular diseases, and also can improve the symptom of cardio-cerebrovascular diseases, and can be used in functional food additives such as natural sweetener, natural anti-oxidant and natural coloring matters. The method provided by the invention is unique, is easy to implement, is small in energy consumption and high in benefits, improves the added value of bananas, and has a great market prospect.