Objective The structure adjacent to the optic nerve is complex. To this end, a three-dimensional optic nerve model is established to achieve the purpose of visually observing the optic nerve from multiple angles.  Methods Copy the head and neck CT angiography(CTA) and digitally and three-0dimensionally reconstruct the optic nerve, sphenoid sinus and posterior ethmoid sinus, and analyze the adjacent structure and classification of the optic nerve on the three-dimensional stereoscopic image.  Results Three-dimensional models of optic nerve, sphenoid sinus and posterior ethmoid sinus were obtained. According to the three-dimensional adjacent structure of the optic nerve, it is divided into three types, namely: sphenoid sinus type, ethmoid sinus type and sphenoid sinus type. The relationship between the sphenoid sinus and the ethmoid sinus gasification degree corresponding to the classification of the adjacent position of the optic nerve was analyzed.  Conclusion In the three-dimensional model, the adjacent structure of optic nerve(OPN) can be observed intuitively and comprehensively.