本文分别建立了已冻结区、未冻结区和过渡界面的热传递偏微分方程。采用有限差分法获得了果蔬内部各层在冻结过程中温度变化的模拟模型。以苹果汁、单体苹果为例进行计算和实测比较，表明模拟方法可信可行。最后分析了冻结中各层温度及其梯度变化、界面迁移过程和表内层的通过冰晶生长时间快慢等。 In this paper, partial differential equations of heat transfer in frozen, unfrozen and transitional interfaces have been established respectively. Finite difference method was used to obtain the simulation model of temperature change in the interior of fruits and vegetables during the freezing process. Taking apple juice and apple as an example, the calculation and comparison are made, which shows that the simulation method is credible. Finally, the temperature and gradient changes of each layer in the freezing process, the interface migration process and the growth time of ice crystals in the inner layer of the table were analyzed.