本文通过对《孔雀东南飞》产生的历史背景和社会文化意识的考证，对刘兰芝被遣原因的“无礼节说”和“门第说”提出了不同的看法。文章剖析诗的语境，发掘诗中隐含暗示的旨意，结合当时的世俗婚姻心理和思想伦理观念，得出刘兰芝被遣源于无嗣的结论。以加深对刘兰芝的全面认识理解，更突出她完美的文学形象。 Based on the historical background and socio-cultural awareness of Peacock Flying Southeast, this paper puts forward different opinions on the reason of “impoliteness” and “the first say” of Liu Lanzhi’s removal. The article analyzes the context of poetry, excavates the implied purpose of implied poems, and combines the then secular marriage psychology and ethics of thought, concludes that Liu Lanzhi was deported from no-heirs. To deepen Liu Lanzhi’s comprehensive understanding of understanding, but also highlight her perfect literary image.