Rumen bypass techniques of amino acid fermentation products include micro pill embedding technique and oil embedding technique. The preparation of nuclear pills usually needs the addition of a lot of excipient and the application of several processes. High content nuclear pill without excipient can be made from fermentation liquid raw materials directly with the method performed in this study. Combining with the uniform coating technique, high-content, low-cost bypass
rumen products which are suitable for mass industrial manufacture can be obtained.