The time of gastric cancer surgery may be different due to different surgical methods, such as distal gastrectomy or total gastrectomy. There are also patient factors, for example, it is difficult for people who are too fat to operate, and the instruments are consistent, which may save more time than manual operation. The length of gastric cancer surgery may be affected by many factors. Generally speaking, the operation time of gastric cancer is about 2 hours. The intermediate process from entering the operating room to leaving the operating room includes not only the time of operation, but also the time of anesthesia before operation, and the recovery time of patients after operation may be longer. From entering the operating room to leaving the operating room, the operation time is about 2 hours, plus the recovery process and preparation process is about 4 hours.