The invention discloses a new Denmark series sow lactation period breaking fodder, wherein the fodder is prepared from, by weight, 40-55 parts of grain, 10-20 parts of bean pulp, 1-5 parts of wheat bran, 5-10 parts of rice bran, 5-10 parts of corn DDGS, 1-3 parts of expanded flaxseed, 2-5 parts of expanded soybean, 1-5 parts of fish meal, 1-3 parts of soybean hull, 0.5-3 parts of grease, 1-2 parts of mountain flour, 0.1-0.3 part of table salt, 0.1-0.3 part of sodium bicarbonate, 1-3 parts of sugar, 0.1-0.3 part of choline chloride, 0.5-1 part of amino acid, 0.1-0.2 part of Vitamin C, 0.01-0.03 part of organic calcium HyD, 0.5-1.5 parts of calcium hydrophosphate, 0.5-1 part of composite microecologics, 1 part of compound premix, 0.01-0.03 part of antioxidant; the fodder is further prepared from at least one of 1-3 parts of sugar beet pulp, 1-3 parts of apple pomace, and 1-3 parts of oat husk. The invention is applied to the new Denmark series lactating sow for three and more piglets; the fodder can effectively release or solve the constipation of the new Denmark series lactating sow, and promote the postpartum.