《鲁迅日记》中“濯足”之意为何,自20世纪90年代有学者提出“性生活”说以来,一直争论至今。论辩双方却因缺乏有说服力的证明材料和更广阔的学术视野使得有信服力的结论难以达成。本文拟从从学术考证和田野调查两个方面考辩,将鲁迅“濯足”放置于当时的时代社会风俗之下,意在证明鲁迅日记中的“濯足”别无他意,今人的揣测有误解之失。 “Lu Xun Diary” in the “soboo ” the meaning of why, since 90s of the 20th century scholars put forward “sex life” has been arguing so far. However, the two sides argued that it is hard to reach a convincing conclusion due to the lack of convincing supporting materials and broader academic perspectives. This article intends to argue from two aspects: academic research and field investigation, to put Lu Xun ’s "enough to place under the social customs of the time, intended to prove that Lu Xun ’ s diary Human speculation misunderstood lost.