Soybean paste was desalted for separating the oligopeptides by using the method of desalination dynamic adsorption and desorption.The desalination rate and peptide adsorption rate were used to analysis the effect of desalination conditions of soybean paste.The results showed that the 001×7 strong acid styrene cation exchange resin was appropriate adsorbent,the optimum desalination condition as follows: loading sample concentration was 4 mg·mL-1,the pH=8 of 50% alcohol was eluent,the flow speed was 30 r·min-...