The present invention discloses a preparation method of a green feed for pigs using antibiotic substitutes. A recipe of the green feed comprises the following ingredients in parts by mass: 150-250 parts of cereal accessory materials, 50-100 parts of Chinese herbal medicinal accessory materials, 5-10 parts of compound fermentation accessory materials, 30-50 parts of carbohydrates and 3-5 parts of compound trace elements. The preparation method of the green feed for the pigs using the antibiotic substitutes uses the Chinese herbal medicines and other ingredients to replace antibiotics to effectively ensure safety of pork, uses the Chinese herbal medicinal accessory materials of radix angelicae sinensis, radix astragali, licorice, caulis spatholobi, etc., and can provide sufficient herbaceous elements for the feed for the pigs, so that the feed for the pigs can basically meet green standards. By adding the carbohydrates, the feed effectively improves an absorption and utilization of the feed for the pigs and drug efficacies of the feed for the pigs. By adding compound trace elements and compound vitamins, the feed is more balanced in nutrition and more diverse in functions.