The invention relates to liquid milk applicable to babies 6-12 months old and a production method of the liquid milk. The liquid milk contains proteins, fat, carbohydrate, vitamin A, vitamin D, vitamin E, vitamin K1, vitamin B1, vitamin B2, vitamin B6, vitamin B12, niacin, folacin, pantothenic acid, vitamin C, biotin, sodium, potassium, cuprum, magnesium, ferrum, calcium, zinc, phosphorus, iodine, chlorine and lactoferrin in specific contents. The liquid milk is comprehensively nutrient and provides energies within a specific range, and is suitable for serving as a breast milk substitute for babies 6-12 months old. Thermosensitive materials are separated from other materials for treatment in the production method, different process combinations are used to treat the materials, the combination of membrane filtering and low-temperature sterilization is used to treat the thermosensitive water-soluble materials, and accordingly degeneration and loss of nutrients in the raw materials are avoided, and the obtained product is especially suitable for babies.