A selenium-rich chicken feed belongs to the field of feeds and is composed of the following raw materials: rice bran, corn, haw, cordate houttuynia, Chinese yam, carrot, grape pomace, purple sweet potato, lycium ruthenicum slag, garlic, dried orange peel, Chinese sauerkraut, rotten vegetable leaves, domestic fungus and distillers' grains. The method for preparing the selenium-rich chicken feed comprises the following steps: (1) fetching rice bran, corn, haw, Chinese yam, carrot, purple sweet potato, garlic and dried orange peel and respectively crushing; (2) fetching cordate houttuynia, grape pomace, lycium ruthenicum slag, Chinese sauerkraut, rotten vegetable leaves, domestic fungus and distillers' grains and carrying out composting fermentation; and (3) uniformly mixing all the raw materials, granulating, and drying. Chicken bred with the selenium-rich chicken feed is rich in selenium and is healthy and safe.