The present invention discloses a method for preparing a Camellia nitidissima Chi lipid-lowering and hypoglycemic agent. Active components such as tea polysaccharides, tea polyphenols, and flavones are extracted from Camellia nitidissima Chi and purified, which are then mixed with pharmaceutical excipients such as hydroxypropyl methyl cellulose, polyvinylpyrrolidone, and triethyl citrate to prepare various pills, tablets, capsules, granules, etc. including sustained release agents and controlled release agents. Thereby, clinical or health care medicine effects of the Camellia nitidissima Chi lipid-lowering and hypoglycemic agent are improved, a dosing frequency is reduced, interference of impurities with the medicine effect is eliminated, relative bioavailability and safety of the active components of the Camellia nitidissima Chi lipid-lowering and hypoglycemic agent in a human body are enhanced, and compliance of a patient is improved.
