The invention provides a compound feed for reserved sows. The compound feed comprises the following components in parts by weight of 55.2 parts of corn, 6 parts of middling, 18.5 parts of soybean meal, 2.5 parts of puffed soybeans, 6 parts of rice bran, 6 parts of bran, 1 part of imported fish meal, 1 part of soybean oil, 1.35 parts of calcium hydrogen phosphate, 1.1 parts of calcium carbonate, 0.4 part of sodium chloride, 1 part of a trace element vitamin compound premix, 0.2 part of lysine, 0.02 part of methionine, 0.05 part of threonine, 0.08 part of choline chloride, 0.02 part of vitamin E, 0.06 part of vitamin C, and 0.05 part of distiller's yeast cell walls. The invention further provides a preparation method of the feed. The feed has great advantages in the raising rate of the reserved sows, the average farrowing number, the estrus rate of the sows at the second estrus period and the third estrus period and the like, and the breeding cost is reduced.