The invention provides a preparation method of a high-
solubility plant polyphenol solid beverage. The preparation method comprises the following steps of (1) enabling zein to dissolve in an
ethanol water solution, performing stirring for 30-60 minutes, adding
plant polyphenols, and continuing performing stirring until the solution is completely clear to obtain mixed liquid I; (2) enabling
sodium caseinate or
gelatin to dissolve in water at 80 DEG C, performing stirring for 30 minutes, performing cooling to
room temperature to obtain a
sodium caseinate solution or a gelatine solution, dispersing the mixed liquid I in the
sodium caseinate solution or the gelatine solution, performing
evaporation to remove
ethanol, adding water until the volume before
evaporation is obtained, and obtaining mixed liquid II; (3) heating natural
polysaccharide to 80 DEG C, then performing stirring and dissolving for 30 minutes, adding
cane sugar,
maltodextrin, essence and water, performing stirring until a uniform-mixed state is obtained, and obtaining
sugar liquid; and (4) uniformly mixing the mixed liquid II with the
sugar liquid, and performing
spray drying. The high-
solubility plant polyphenol solidbeverage can effectively increase the
solubility of
curcumin and
resveratrol in water, so that the prepared
solid beverage has good functions of resisting
in vitro oxidation and the like.