The invention discloses a method for preparing defatted peanut
protein powder under low temperature, which solves the problems that the NSI value of the prior defatted peanut
protein powder is low, so that the functional characteristics of products, such as
solubility, water and oil absorbility, emulsibility, etc. are low. The technical proposal comprises preparing the defatted peanut
protein powder through the primary low-temperature pre-pressing, quality adjusting, leaching, low-temperature exsolution and super fine crushing to a defatted peanut after being dried with the red
skin eliminated at low temperature; the whole production process is carried out under low temperature, and the obtained defatted peanut protein powder is in white or light yellow color, has less than 6.0 weight percent of water, less than 2 weight percent of fat, more than 60 percent of
protein content (N*6.25, butt), and more than 60 percent of
nitrogen solubility index, long storage time, good functional characteristics, such as
solubility, water and oil absorbility, emulsibility, etc., good
palatability and high peanut protein utility rate.