Combined lumbar and epidural anesthesia, that is, combined subarachnoid and epidural block anesthesia, has been widely used for lower abdominal surgery in recent years, and the anesthetic effect is relatively satisfactory. The advantage of combined lumbar and epidural anesthesia is that it retains the advantages of rapid onset of lumbar anesthesia, perfect analgesia and muscle relaxation, and also facilitates the mediation of the anesthetic plane to prevent the anesthetic plane from being too high. Additional local anesthetic as needed via the epidural catheter can make up for the lack of tissue plane or tissue time in the thoracic segment of lumbar anesthesia alone, and can complete a long operation. The amount of local anesthetic is usually 1/3 of that of a simple epidural block and allows for postoperative analgesia. The puncture method for combined lumbar and epidural anesthetic block can be either a two-point puncture method or a one-point puncture method, in which the drug is injected into the subarachnoid space and the puncture needle can also be placed into the epidural catheter via this.