The invention disclsoes a preparation method of balanced-nutrient and low-fatality-rate feed for meat ducks. The preparation method comprises the following steps: mixing and stirring wheat gluten powder and water; adding neutral proteinase and transglutaminase and carrying out enzyme destroying, freezing and drying to obtain a prefabricated material; mixing and stirring soybean lecithin, dichloromethane and absolute ethyl alcohol; adding a palladium catalyst, and stirring in a high-pressure kettle; separating, de-coloring and removing a solvent; adding vitamin E, soy protein isolate, xylooligosaccharide, sucrose monostearate and the prefabricated material to obtain modified soybean lecithin; after uniformly mixing barley flour, black soybean flour, cabbage caterpillar powder, monocalcium phosphate, yeast protein powder, fructooligosaccharide, choline chloride, vitamins, corn straws, peanut meal, full-fat rice bran, green bristlegrass herb, beet leaf, high-temperature-resisting phytase, diatomite, soybean phospholipid oil and the modified soybean lecithin, granulating to obtain the balanced-nutrient and low-fatality-rate feed for the meat ducks.