本文分６个年龄组对１８０具正常小儿尸体的鼻腔进行了观测．主要结果：（１）鼻前孔的形状分３型，鼻后孔的形状分４型．（２）鼻腔内各种结构的长度和宽度多数随年龄的增长而增加．（３）鼻中隔位置属居中型少见，出现率仅为１３．８９±２．５８％．（４）鼻腔底壁位置以前高后低位多见，出现率为６２．２２±３．６１％．（５）鼻泪管的开口于下鼻道的前上方，开口处由囊状膜覆盖的共２３侧，出现率为８．１０±１．１２％． This article is divided into six age groups of 180 normal children’s nasal cavity was observed. Main results: (1) The shape of the anterior nasal hole is divided into 3 types, the shape of the posterior nasal hole is divided into 4 types. (2) Most of the length and width of various structures in the nasal cavity increase with age. (3) Nasal septum position is moderate and rare, the incidence was only 13.89 ± 2.58%. (4) The position of the bottom of the nasal cavity was more common than the previous high and the incidence rate was 62.22 ± 3.61%. (5) Nasolacrimal duct opening in the front of the lower nasal tract, the opening covered by the cystic membrane of a total of 23 sides, the incidence was 8.10 ± 1.12%.