清末是中国思想革命最剧烈的时代，新旧思想观念在诸多方面进行着激烈的斗争。本文以大 量的事例剖析了封建理学观念在革命思想的冲击下发生嬗变。一方面，三从四德的理学观念仍在顽固地腐蚀 着人们的灵魂；另一方面，近代思想家又给主张寡妇再嫁的反理学思想注入了新的时代精神，这是历史发展的 必然。 The late Qing Dynasty was the most violent period of the ideological revolution in China. The concepts of the old and new ideas were fiercely contested in many aspects. This paper analyzes the concept of feudalism under the impact of revolutionary ideas with a large number of examples. On the one hand, the concept of “three from four” is still stubbornly corrupting people’s souls; on the other hand, modern thinkers have infused a new spirit of the times into the anti-rationalism that advocates the remarriage of widows, which is an inevitable historical development.