The invention discloses an instant lactagogue tea and a preparation method thereof. The instant lactagogue tea is characterized by being prepared from the following raw materials in parts by weight: 400-420 parts of tea leaves, 15-16 parts of Chinese yam, 10-12 parts of red dates, 10-11 parts of liquorice, 15-16 parts of Chinese angelica, 10-12 parts of astragalus mongholicus, 10-11 parts of loofah sponge, 10-12 parts of motherwort, 15-16 parts of donkey-hide gelatin, 10-11 parts of pangolin, 30-40 parts of activated carbon, 45-46 parts of rapeseed oil, and 0.1-0.2 part of hydroxypropyl methyl cellulose. According to the instant lactagogue tea disclosed by the invention, tea water is filtered by the activated carbon, so that caffeine in the tea water can be filtered off; a membrane is formed on the surface of the treated activated carbon, so that flavored substances in the tea water, except the caffeine, can be prevented from being absorbed by the activated carbon; tea particles are coated by the hydroxypropyl methyl cellulose, so that the instant lactagogue tea disclosed by the invention has good moisture resistance, and the phenomenon that the tea particles absorb moisture and are agglomerated during storage is avoided; in addition, various traditional Chinese medicine ingredients are added to the instant lactagogue tea, so that the instant lactagogue tea has the efficacies of activating blood, removing blood stasis, treating stranguria, promoting lactation, and improving health of postpartum women.