The invention discloses a method for enriching flavonoid component in traditional Chinese medicine psoralea corylifa, which is characterized by removing non-target components of the traditional Chinese medicine psoralea corylifolia, and enriching and extracting the flavonoid component. The method comprises the steps of: decocting the a psoralea corylifolia medicinal material with water, discardingan extract, drying the drug residue, pulverizing the drug residue, extracting with petroleum ether, discarding the extract, extracting the obtained drug residue with ethanol, and concentrating the obtained extract into an extract, and then dissolving the obtained extract in methanol, mixing a sample with silica gel and performing silica gel column chromatography, eluting the material with an petroleum ether-ethyl acetate mixed solution and ethanol sequentially, and collecting an ethanol eluate to obtain the product. The method is simple and easy to implement, can remove the non-target components with high content in psoralea corylifolia as much as possible, and improves the enrichment efficiency of flavonoid component in psoralea corylifolia.