There are no side effects of painless childbirth injections. The most commonly used painless delivery injection is epidural block anesthesia, which originated from abroad and has a history of 100 years now. At present, it has become very common in China, and many hospitals have carried out painless delivery, so mothers-to-be can be assured that it is a simple, safe and mature technology. Painless delivery needle has the following special requirements: 1. no effect on mother and baby; 2. easy to administer, fast onset, reliable effect, and can achieve full labor analgesia; 3. no effect on the labor process, and can speed up the labor process; 4. the mother is awake and can participate in the labor process; 5. can meet the needs of surgery when necessary. The epidural block anesthesia technique is administered and monitored by anesthesiologists throughout the process, and the required effect is analgesia rather than anesthesia. The essential difference between analgesia and anesthesia is that analgesia should be without loss of consciousness and motor nerve blockade, that is, walkable epidural labor analgesia can be achieved. It is often administered by continuous infusion method, and the analgesic effect is continuous and stable. It has no significant effect on contractions, does not affect maternal movement, does not cause hypotension, and has minimal adverse effects on the fetus and neonate, but the second stage of labor may be prolonged.