Abstract: In order to understand the quality change of rice during the desorption process when the water content was greater than 18%,this paper explored the quality change law of high-moisture rice at different temperatures(35,25,15℃). A prediction model for quality change was established to predict the change law of rice fatty acid value,fatty acid value was used as an indicator of rice quality deterioration. The results showed that:As the temperature rised,the moisture content of the rice decreased,simultaneously,the fatty acid value of the rice,the hardness of the rice,and the gelatinity of the rice increased. With the increase of time,the elasticity showed an upward and then a downward trend,and rice processing quality was on the rise. At three temperature conditions,the quality of high-moisture rice deteriorated faster at 35℃,and 15℃ could slow down the quality deterioration. At the same time,the prediction model for the change of fatty acid value of high-moisture rice was:lnA=0.0193e^409.09/T·t+lnA₀,and the relative error between the predicted value and the measured value obtained by the prediction model was less than 10%,which was lower than 15% accuracy requirements for general numerical simulation,the prediction model was credible.