Abstract:The soybean minor peptides are the products that the soy protein hydrolyzed.The soybean minor peptides are of better physical and chemical properties and physiological activity compared with the soy protein.At present，the main method to produce the soybean minor peptide is by enzymatic transformation or microbial fermentation.In order to obtain a simple and environmentally friendly method of extracting soybean minor peptides，a new type of electronic cracking device to extract soybean minor peptides was studied.The device's basic principle was that the soybean soaked in water was processed by sinusoidal alternating current which was of variable frequency and variable voltage.The method don't add any chemical reagents and hydrolyzes soy protein to prepare the soybean minor peptide by physical means.The results showed that the content of the soybean minor peptide prepared by electronic cracking for about 60 min was high.And the results indicated that the electromagnetic cracking method could extract soybean minor peptides effectively.The electromagnetic cracking time had an effect on the content of peptides.Around 60 min，the soybean minor peptides reached the maximum contents.