the effects of cooking, retrogradation and drying on starch digestibility of instant rice making of three varieties were investigated. By properly selecting a lower cooking temperature at 86 C with minimum time as well as adding limited water significantly reduced RDS of cooked rice. This corresponded to the observed morphology which showed more intact starch granule in OP rice, compared to TEC rice. One-day retrogradation was enough for the three varieties of rice for the conformation of starch molecular structure. Low-temperature drying followed by high-temperature drying resulted in slowing starch digestibility due to the propagation of crystalline of starch molecules. This may provide a way to improve the nutritional value of prepared instant rice. In particular, we demonstrated the proportions of RDS, SDS and RS during retrogradation varied among the three rice varieties based on their respective molecular structure. Through this innovative process of preparing instant rice, the RDS fraction of low-amylose rice might be reduced to a level similar to high-amylose rice. Moreover, low-amylose japonica rice was more suitable for making instant rice with a higher SDS, whereas indica rice was superior for making instant rice with a high RS.