Dura mater mainly includes dura mater and dura mater, the main component is dense connective tissue, from the outer layer to protect and support the brain and spinal cord tissues, easy to be pulled in the process of trauma and tear phenomenon, after the injury is not easy to self-healing, easy to cause intracranial pressure, cerebrospinal fluid leakage and other phenomena. 1, dura mater: mainly by the dense connective tissue composed of thick and tough fibrous membrane, wrapping the spinal cord and spinal nerve roots, at the upper end and the occipital foramen magnum connected to the dura mater, at the lower end of the wrapped end filaments attached to the caudate. The dura mater is connected to the dura mater at the upper end and the foramen magnum of the occipital bone, and at the lower end, it wraps around the end-filament and attaches to the caudal bone. There is an epidural space between the dura mater and the periosteum of the inner surface of the spinal canal, and this space is under negative pressure, and the epidural anesthesia usually used in the clinic is to inject drugs into this space to block the nerve conduction; 2. Dura mater: it is mainly a thick and tough double-layered dense connective tissue membrane, rich in nerves and blood vessels, with the outer layer of the endosteum and the inner layer of the meningeal layer, and it can form a spacer to separate the cranial cavity and deeply penetrate into the brain tissues to protect the brain tissues. The dura mater is a layer of dense connective tissue that is rich in nerves and blood vessels, and the inner layer is the meningeal layer. It is important to protect the dura mater in normal life, and even after anesthesia, bed rest is needed for a period of time to promote the repair of the dura mater.