Objective To study the characteristics of continuous coronal sectional anatomy of middle turbinate combined with thin-layer CT scanning and 3D digital reconstruction, so as to provide the structural anatomical basis for the operation of nasal sinus from back to front.   Methods Four adult cadaver heads (8 sides) were scanned by spiral CT of the paranasal sinuses, and then dissected in continuous coronal section. The corresponding CT images were labeled to observe the morphological characteristics of the 3 parts of the middle turbinate and the corresponding relationship with CT images. The middle turbinate was reconstructed by 3D threedimensional digital reconstruction with thin slice CT of the paranasal sinuses. 

 Results The morphological characteristics of the middle turbinate were as follows: the free end of the horizontal part of the middle turbinate was spherical and attached to the lateral wall of the nasal cavity with plate-like structure; The plate-like structure was divided into anterior and posterior bone plates, the former was ethmoidal base plate, the latter was middle nasal methyl plate, and attached to the brain plate obliquely forward and upward; Between the ethmoidal base plate and the middle turbinate base was the anterior ethmoidal sinus; The vertical part of the middle turbinate was attached to the frontal nasal ridge and brain plate in a fan-shaped upward sagittal position from the horizontal part of the middle turbinate; The CT images of the three typical parts of the middle turbinate in the sectional anatomy of the coronal position were marked; The three-dimensional reconstruction of the middle turbinate is completed.  Conclusion The morphological changes of the posterior to anterior middle turbinate can be concluded from the observation of the sectional morphology of the coronal position, which provides the anatomical basis for the operation route from the posterior to the anterior.