The invention provides a preparation method of sauced medlar sliced dried beef, which comprises the steps of: slicing and dicing beef, cleaning, soaking for removing raw meat and being tasty, marinating, and drying by microwaves. The preparation method is simple in process; and the prepared sliced dried beef is orange in color, is delicious, is kept in meat quality, has natural taste of soy sauce after being chewed, is sweet and crisp during eating, is fresh in mouthfeel, and leads people to endless aftertastes. The marinating procedure and the smudging procedure are eliminated, thus the generation of carcinogens is avoided; and meanwhile, during marinating, Chinese wolfberry fruit with the functions of tonifying Qi and enriching blood, ginseng, astragalus mongholicus, chestnut, bighead atractylodes rhizome, prepared salt and other Chinese medicinal herbs are decocted, so that the prepared sliced dried beef has the health function and is healthier during eating.