To analyze the characteristics and basic principles of the medical support and anesthesia for the Shenzhou eleven astronaut landing field, and to summarize the experience of the medical care and anesthesia in the main landing field of our country, and to ensure the security tasks in the special environment such as the emergency return of manned space flight. To review the reports on the medical care and anesthesia of the astronauts at landing field, and summarize the experience of the medical care and anesthesia of the Shenzhou five to the Shenzhou ten astronaut medical support landing field, and put forward a series of organizations and prepositions on the environment characteristics of the "Shenzhou eleven" in the long time and the cold weather in the main landing field of the scheduled return time. Case, equipment and effective treatment plan, and be tested in actual combat. On the basis of the original first aid, the first aid equipment was adjusted, the first aid procedure was optimized, the heat preservation heating device was added, the laryngeal mask, the anti fog visible laryngoscope and the portable ultrasonic device were introduced, and the anesthesia and medical care plan for the manned space landing field was formulated, which was the astronaut stay in the space and the cold and complicated weather conditions. The treatment and medical care provided a strong guarantee. The first aid support scheme of the Shenzhou eleven spacecraft's main landing field was improved and optimized, and it fully met the medical security task of the special environment such as the astronaut emergency return and so on in the cold weather.