The invention provides high-
solubility sunflower seed protein as well as a preparation method and application thereof, and relates to the technical field of
protein modification. The preparation method comprises the following steps: preparing
sunflower seed protein isolate with the pH value of 7 into a
sunflower seed protein solution, adjusting the pH value of the
sunflower seed protein solution to 8-10, stirring for 20-40 minutes, treating under the ultrasonic condition of 200-600 W for 5-25 minutes, adjusting the pH value of the
sunflower seed protein solution subjected to ultrasonic treatment to 7.0, and freeze-
drying to obtain the high-
solubility sunflower seed protein. The sunflower seed
protein structure is promoted to undergo an aggregation-
depolymerization-rearrangement process through pH circulation and ultrasonic treatment, a microenvironment of hydrophobic
amino acid is converted into a hydrophilic environment, sunflower seed
protein molecules are converted into a molten ball state and dispersed to form
small particles, the problem that the sunflower seed protein is poor in
solubility is greatly solved, operation is easy, cost is low, and the method is suitable for industrial production. And further application of the sunflower seed protein in
food processing is promoted.