《北京人》是曹禺戏剧中最具悲剧性的作品之一，相比曹禺其他早期悲剧，其故事情节波澜不惊，但是却带给人强烈的悲哀感。本文分析了《北京人》的五个悲剧性因素：新与旧的冲突、爱情三角恋模式、憧憬与幻灭的家族特征、故事发生时间的选择（悲秋与节日）、以及人物沟通时的障碍。这些悲剧因素与中国传统悲剧主题是相呼应的，以此可以来探讨《北京人》悲剧性的产生。

Peking Man is one of the most tragic works in Cao Yu's drama. Compared with other early tragedies by Cao Yu, the story is not placid, but it gives people a strong sense of grief. This article analyzes the five tragic factors of Peking Man: the new and old conflicts, the love triangle love mode, the family characteristics of jealousy and disillusion, the choice of the time of the story (miserable autumn and festivals), the mutual catastrophe in the character's conversation. These tragic factors echo the theme of traditional Chinese tragedies, so as to explore the tragic birth of the Peking Man.