概述了对流干燥问题的一般研究方法；探讨了建立干燥物理模型与数学模型中存在的问题；分析了水分和物料骨架的结合形式与脱水机制及脱水顺序之间的关系。指出：合理选择薄层物料试验的料层厚度，把薄层试验结果与干燥理论模型有机结合起来，把干燥理论和试验研究的结果合理地应用于解决干燥装置的优化问题是对流干燥领域中值得研究和探讨的重要问题。 The general research methods of convection drying are summarized. The problems existing in the establishment of drying physical model and mathematical model are discussed. The relationship between the combination form of water and material skeleton, dehydration mechanism and dehydration order are analyzed. It is pointed out that the reasonable choice of the material thickness of the thin-layer material test and the organic combination of the thin-layer test result and the theoretical model of drying, and the reasonable application of the theory of drying and the experimental research to solve the optimization problem of the drying device are worthy in the field of convection drying Research and discussion of important issues.