目的　探讨前庭膜在维持蜗管内外离子和液体平衡中的作用和功能。方法　借助扫描电子显微镜观察豚鼠前庭膜的表面结构。结果　前庭膜外淋巴侧间皮细胞表面界限不太清楚 ,细胞边缘不连续 ,细胞表面和边缘微绒毛少 ,间皮细胞核呈圆形略凸起。前庭膜内淋巴侧为单层多角不规则性上皮细胞 ,细胞呈圆形或椭圆形状 ,细胞扁平界限清晰 ,细胞游离面有微绒毛 ,而细胞周边微绒毛丰富 ,细胞之间连接比较紧密。结论　前庭膜是中阶和前庭阶之间的屏障 ,在维持内外淋巴离子和液体的平衡方面起重要作用 Objective To investigate the role and function of vestibular membranes in maintaining the balance of ions and liquids in and around the scroll. Methods Scanning electron microscopy was used to observe the surface structure of guinea pig vestibular membranes. Results The surface boundary of the extrametalateral mesangial cells of the vestibular membrane was not clear, the edges of the cells were discontinuous, the microvilli on the surface and margins of the vestibular membrane were less, and the nucleus of the mesothelial cells was slightly convex. The anterior vestibular membrane is a single layer of multi-angle irregular epithelial cells, the cells were round or oval shape, flat cells clear boundaries, cell free surface microvilli, while the cell periphery microvilli, the connection between the cells more closely. Conclusions The vestibular membrane is a barrier between the medial and vestibular levels and plays an important role in maintaining the balance between the internal and external lymphatic currents and the fluid