Preparation method of high-gel-property alcohol-process soybean protein concentrate

The invention provides a method for preparing soybean protein concentrate by an alcohol method. The method comprises a water extraction step, a heat treatment step, an alcohol extraction step, an enzymolysis step and a thermal modification step, wherein in the heat treatment step, the soybean meal obtained in the water extraction step is heated to 85-95 DEG C, and the temperature is maintained for 5-10 minutes; the enzymolysis step comprises the step of hydrolyzing the precipitate obtained in the alcohol extraction step by using polysaccharide hydrolase. The invention also relates to the alcohol-process soy protein concentrate obtained by the method, application of heat treatment and enzymolysis in improving the gelling property and/or solubility of the alcohol-process soy protein concentrate, and application of the polysaccharide hydrolase in preparing the alcohol-process soy protein concentrate with improved gelling property and/or solubility. The solubility, gel hardness and elasticity of the alcohol-proce