The invention discloses a method for preparing total ginkgo flavone glycosides slow-release capsules by applying attapulgite, which comprises the following steps of: washing, drying and pulverizing gingko leaves into coarse powder; adding the gingko leaf coarse powder and petroleum ether with the weight ten times of the gingko leaf coarse powder into a container, refluxing and extracting for 1 hour, degreasing, filtering and drying; adding water with the weight ten times of the degreased gingko leaf coarse powder into the degreased gingko leaf coarse powder, boiling, decocting for 3 times, combining decocting liquids, filtering and concentrating to the relative density of 1.10; adding ethanol with the mass concentration of 95 percent into a concentrated liquid until the ethanol concentration is 70 percent, depositing, settling and filtering; adsorbing a filtrate through modified attapulgite to obtain the attapulgite loading total ginkgo flavone glycosides; and adding a pharmaceutical adjuvant material into the attapulgite loading total ginkgo flavone glycosides, and encapsulating into empty capsules to obtain the total ginkgo flavone glycosides slow-release capsules. The invention adopts the principle of adsorption separation and selects the modified attapulgite with strong adsorbability for the total ginkgo flavone glycosides to directly prepare a preparation without elution, the total ginkgo flavone glycosides slow-release capsules are slowly desorbed under the desorption action of a body fluid, steps are simplified, the production period is shortened, and the yield of products is improved.