Oral liquid containing mango seed extract and preparation method of oral liquid

The invention discloses an oral liquid containing a mango seed extract and a preparation method of the oral liquid. The preparation method comprises the following steps: cleaning mango seeds serving as a raw material, drying and smashing to 40-60 meshes; adding pure water; and performing ultrasonic extraction, clarifying, filtering, concentrating, and adding 0-10 percent of Chinese herbal medicines and 0.1-0.3 percent of sodium benzoate, sterilizing, sealing and packaging to obtain the oral liquid containing the mango seed extract. The oral liquid containing the mango seed extract is rich in amino acids, proteins, vitamins, anti-microbial substances and immune substances, can be used for preventing and treating diseases of various types of livestock, has particularly remarkable disease prevention and treatment effects during nonreactive feeding of pigs, and has the advantages of simple manufacturing process, saving in energy and time, and easiness in realization of industrial production.