This study aimed to measure the bilateral internal aperture of the jugular foramen to internal acoustic pore, bilateral external aperture of the jugular foramen to occipital condyle, and atlas transverse process, so as to provide imaging evidence for different ways of clinical operation and smoothen the operation by protecting important nerves and blood vessels in this area. We scan 120 volunteers' skulls on computed tomography who had no skull base lesions. High-resolution spiral computed tomography multiplane reformation is used to rebuild the three-dimensional reconstruction of the brain. The difference of our study from others is that we select some specific sections to make the measurement more accurately.