The invention relates to Chinese-herbal-medicine banana slices and a preparation method thereof, and belongs to the field of deep processing of bananas. The Chinese-herbal-medicine banana slices are prepared from bananas, agar powder, sucrose, turnip seeds, fructus rosae laevigatae, common selfheal fruit-spike, semen alpiniae katsumadai, cortex eucommiae, kudzuvine roots, poria cocos, caulis akebiae, and cape jasmine roots. The preparation method of the Chinese-herbal-medicine banana slices comprises the following five major steps of baking banana slices, decocting Chinese herbal medicines so as to obtain a juice, carrying out mixing, carrying out freezing, and carrying out coating with syrup. The banana slices and the Chinese herbal medicines are combined according to the preparation method so that the prepared Chinese-herbal-medicine banana slices are rich in nutrition, good in taste, and fine in flavor; moreover, the Chinese-herbal-medicine banana slices also have the health-care effects of clearing the intestines and the stomach, relieving alcoholism, tonifying the liver, improving the eyesight, clearing away heat, detoxifying, lowering blood pressure, reducing blood sugar and blood lipid, and so on. The preparation method is simple in processes, convenient in operations, capable of shortening processing time and improving work efficiency, and easy to popularize.