Abstract: The preparation of p-aminodiphenylamine by the nitrobenzene process is reviewed．The research progress of organic solvent and bases，control of temperature and water content，hydrogenation catalytst and reactor is summarized. The advantage of preparation of p-aminodiphenylamine by the carbanilide process is discussed.

摘要： 介绍了硝基苯法制对氨基二苯胺合成工艺及原理，分析了制备工艺中有机溶剂、碱的选择，温度、水分的控制，加氢催化剂、反应器的选择等的研究进展，评述了硝基苯法的改进——碳酰苯胺法制对氨基二苯胺工艺，论述了该工艺的优点。