Soybean protein isolate (SPI) is a mixture of different types of protein obtained from soybean by method of basic extraction and isoelectric precipitation. For traditional extraction process, there are several disadvantages such as high water consumption, low protein recovery, protein degradation. In this study, a new process based on multi-stage countercurrent solid-liquid extraction (MSCSLE) was investigated to decrease water consumption and optimize the process of protein release. The main proteins were ...