The invention discloses collagen milk tea and a preparation technology thereof. The milk tea consists of the following components in parts by weight: 2-6 parts of tea powder, 40-60 parts of collagen fat powder, and 8-12 parts of whole milk powder, wherein the collagen fat powder contains collagen, has biodegradability, is rich in amino acids including amino acids, proline, hydroxyproline and the like required by human bodies, has the effect of protecting the skin, can prevent calcium in skeleton from running off, can prevent osteoporosis, beside, can also enable cornea to keep transparent, and has favorable health-care efficacy. Compared with common milk tea in the market, the collagen milk tea has higher nutrient value, the milk fragrance and the tea fragrance are richer, the taste is mellow, fresh and refreshing, the milk tea is sweet after taste after being drunk, and the collagen being high in protein content and easy to digest and absorb by human bodies is matched with the milk tea, so that the collagen milk tea not only meets the pursuit of consumers, particularly young consumers for mouth feel, but also meets the requirements of people for healthy diets in modern society.