建立了一个玉米低温干燥的数学模拟程序，主要包括传热传质和霉变两部分。模拟的基本方法即将深床谷物等分为一系列薄层，将干燥时间等分为一系列时间间隔。同时在纯平衡模型的基础上，引入了薄层干燥与薄层湿化方程，考虑谷物与气流间的状态不平衡；引入吸湿平衡含水的质量分数方程，以考虑解析与吸湿间的滞后效应。模拟结果表明，该程序基本有效。 A math simulation program of low temperature drying was established, including heat and mass transfer and mildew. The basic method of simulation is to divide the deep-bed cereal into a series of thin slices, dividing the drying time into a series of time intervals. At the same time, based on the pure equilibrium model, the thin layer drying and thin layer wetting equations are introduced, and the state imbalance between grain and air flow is taken into account. The mass fraction equation of moisture absorption equilibrium moisture is introduced to consider the hysteresis effect between analytic and moisture absorption. The simulation results show that the program is basically effective.