The invention relates to chili con carne and a preparation method thereof and belongs to the field of food processing. The chili con carne is packaged by adopting a hydrogen-filled sealing form and prepared from diced chicken meat, minced fish flesh, edible fungus fragments, edible vegetable oil, thick broad-bean sauce, a chilli powder, sesame, perilla leaf fragments, fermented soya beans, bruised fresh ginger, minced garlic, minced green prickleyash, ground pepper, kelp residue, table salt, honey, steamed fish soy sauce and a spice extracting solution. The preparation method of the chili con carne comprises the following steps: A, heating a pot; B, frying; C, removing from the pot; D, filling hydrogen and carrying out sealed package. The product disclosed by the invention has the advantages of abundant nutrition, full fresh spicy taste, strong aroma, bright color and luster and deliciousness; in addition, on the premise of not adding preservatives, the preservation time is long; besides, since monosodium glutamate and a spicy material body are not added, the chili con carne is healthier to eat and can better meet the needs of vast consumers; the preparation method of the chili con carne is simple and convenient in operation; the flavor, the quality and the mouth feel of the chili con carne are greatly improved; in addition, the input cost is not high, so that the preparation method is suitable for industrial production.