Abstract: In order to study the law in variation and distribution of internal water of millet during soaking and germination, low field nuclear magnetic resonance (LF-NMR) technology was used to dynamically monitor the whole process. The results showed that, during millet soaking, the bound water was the main portion, and part of the bound water gradually changed into free water, the total water, free water and bound water all increased rapidly and then tended to be stable. Therefore, the optimal soaking time was 10 h. During millet germination, the internal water was mainly semi bound water and bound water, part of bound water and free water gradually changed into semi bound water, and the combined water decreased slightly while the total water, semi bound water and free water increased significantly. The law of internal water change of millet during soaking and germination revealed in this study laid theoretical foundation for the development and application of millet germination products.