The invention discloses a method for preparing a composite fruit-vegetable glutinous rice cake, belonging to the field of food processing. The glutinous rice cake is prepared from such raw materials as glutinous rice, black rice, barley, glutinous millet, jersey cudweed meal, sweet potato leaf meal, apple meal, edible fulvic acid, skimmed milk powder, concentrated juice of grape and concentrated juice of roxburgh rose. The method for preparing the glutinous rice cake comprises a series of procedures of weighing the raw materials, mixing the rice, washing the mixed rice, preparing flavor enhancers, soaking the rice by ultrasound, preparing blanks and combining into shapes. The method disclosed by the invention is a useful exploration and breakthrough of the existing technology for processing the glutinous rice product, the glutinous rice cake prepared by adopting the method is different from the traditional glutinous rice cake in color, taste, nutrition structure, shelf life and preparation method, has a unique color, strong milk flavor and long shelf life, tastes sweet, sour and delicious, is easy to digest and rich in nutrients, is green and natural and has a health-care function of preventing cancers and beautifying skin, and the process for preparing the glutinous rice cake is feasible and suitable for large-scale production.