1, injection site: Epidural anesthesia is to inject drugs directly into cerebrospinal fluid to anesthetize neurons, while epidural anesthesia is to inject drugs into epidural space to achieve anesthetic effect through the diffusion of nerve roots.

2. Anesthesia effect: the epidural anesthesia effect is fast and strong, and the pain disappears well; Epidural anesthesia takes effect slowly, but it can be administered repeatedly through epidural catheter, which is suitable for patients who need long-term surgery.