The invention provides a method for preparing a plant polyphenol functional drink, comprising the following steps: (1) dissolving zein in an aqueous ethanol solution, stirring for 30-60 minutes, adding plant polyphenols, and continuing to stir until the solution is completely Clarify to obtain mixed solution 1; (2) disperse mixed solution 1 in acidic water, evaporate to remove ethanol, add water to replenish the volume before evaporation to obtain mixed solution 2; (3) heat natural polysaccharide to 80°C and stir to dissolve for 30 minutes, After cooling to room temperature, adjust the pH value to 4.0 to 4.5, then add sucrose, essence, preservative, ginger extract, kudzu root extract, and water, and stir until the mixture is uniform to obtain a sugar solution; (4) mix the mixed solution 2 with the sugar solution, Stir for 15 minutes after heating to 90° C., and obtain a plant polyphenol functional drink after sterilization and filling. The invention can effectively improve the solubility of plant polyphenols - curcumin and resveratrol in water, so that the prepared functional drink has good anti-oxidation and other functions in vitro.