The method of coumarin synthesis using salicylaldehyde was selected,flow chart and operation process were studied in this paper.

• 对香豆素常用的三种合成方法进行了介绍,对其工业化生产的优缺点进行了对比,最终选定了水杨醛法,并给出了工艺流程图和操作步骤。