The objective of this study was to analysis the moisture change of dried mushroom(Lentinus edodes)by six different drying methods during rehydration process.The tests were performed by low-field nuclear magnetic resonance and nuclear magnetic resonance imaging technology.The T2 relaxation test showed that with the extension of rehydration time,the main state of water in dried mushroom was immobilized water instead of free water.The water signal of non-uniform intermittent drying(NUID) group was significantly stronger than other groups,which indicated its best rehydration capacity.The Uniform intermittent drying(UID) group had the poorest rehydration capacity.The key to improve the rehydration efficiency is to ensure the uniform transfer of water in the process of drying in order to have a good ability to maintain the immobilized water during rehydration process.