The invention belongs to the field of daily chemical products and relates to sea fennel infant bath foam and a preparation method thereof. The bath foam is prepared from squalane, a seaweed extract, wheatgerm oil, natural glycine betaine, shea butter, avocado oil, an edelweiss extract, cow milk and a traditional Chinese medicine additive, wherein the traditional Chinese medicine additive is prepared from, Barbados aloe, chamomile, tenuifolia, periostracum cicada, ginger, korean pine seeds and ailantus endocuticle. The sea fennel infant bath foam is high in safety, mild, free of stimulation, capable of combining hair washing and bathing and suitable for infant skin physiological characteristics, the marine organism extraction essence is used as main components and mixed with various animal and plant essences with the moistening and antibacterial actions, hair and skin of infants can be effectively moistened, and the long-term antibacterial, moisturizing, nourishing and softening purposes are achieved for the skin of infants.