The invention discloses miscarriage prevention feed for black pigs and a preparation method of the feed. The feed comprises the following raw materials in parts by weight: 160-180 parts of corns, 170-190 parts of yellow beans, 100-120 parts of biscuit residues, 40-50 parts of gynura bicolor, 35-45 parts of begonia fimbristipula hance, 20-30 parts of agaric, 15-18 parts of day-lily buds, 18-23 parts of mung bean sprouts, 40-60 parts of willow leaves, 130-140 parts of barley flour, 140-150 parts of swine plasma protein powder, 40-60 parts of fine rice bran, 3-4 parts of gelatine powder, 13-18 parts of crab shell powder, 7-8 parts of sesame oil, 2-3 parts of salt, 20-30 parts of lentinus edodes powder, 15-25 parts of water chestnut powder, 5-6 parts of sucrose and 0.5-1 part of black pig nutrient. The feed is nutritional, healthy, delicious, safe and nonhazardous, and can provide sufficient nutrient substances such as proteins, fat, carbohydrates, vitamins, minerals and the like for the female black pigs during the gestation period, so that normal embryonic development is guaranteed, occurrences of miscarriage, fetal feebleness and fetal death is reduced, and the breeding benefits of the black pigs are increased.