Grain-saving type compound feed for laying duck at egg producing period and using method for grain-saving type compound feed

The invention discloses a grain-saving type compound feed for a laying duck at an egg producing period and a using method for the grain-saving type compound feed. The feed comprises the following components in percentage by mass: 32-46% of corns, 14-28% of big potatoes, 15-20% of bean pulp, 3-5% of corn protein powder, 2-5% of rapeseed dregs, 3-6% of cottonseed meal, 0.1-0.3% of methionine, 0.3-0.6% of lysine, 0.3-0.4% of salt, 1.5-1.8% of calcium hydrogen phosphate, 6.5-7.5% of mountain flour, 0.1-0.2% of choline, 0.1% of vitamin premix and 0.2% of trace element premix. Compared with the prior art, the grain-saving type compound feed has the beneficial effects that: firstly, the big potatoes are used to replace part of corns in the compound feed for the laying duck at the egg producing period, so that the dosage of corns in the feed for the laying duck at the egg producing period is reduced, and the tension feed resource condition of China is relieved in a facilitated manner; secondly, on the condition of reducing the dosage of corns, the fed laying duck at the egg producing period can obtain the feeding effect which is achieved by the feed with corns, so that the raw material cost of the feed is reduced, and the feeding cost of the laying duck at the egg producing period is reduced in a facilitated manner.