Lateral side anastomosis surgery for esophageal cancer includes intrathoracic lateral side anastomosis and cervical lateral side anastomosis, and the surgical methods are different for different surgeries. 1. Intrathoracic lateral side anastomosis: with the support of laparoscopy, the stomach is freed and a small incision is made on the right side, and then the anastomosis is completed. Inside the chest, the stomach is made into a gastric tube using an ordinary large stump closure, an anastomosis is made in the stomach wall, the esophagus and stomach are incised with a linear cutting closure, the posterior wall of the anastomosis can be seen through the laparoscope, and after checking that there are no problems, the gastric tube is released, and the anterior wall is closed with a small stump closure. 2. Cervical side-to-side anastomosis: under the support of thoracoscopy, the esophagus is freed, and then the stomach is freed by laparoscopy, and a small incision is made in the neck to raise and cut off the esophagus. A small incision of about 5cm is made in the middle of the abdomen to raise the esophagus and stomach, and the gastric tube is raised to the neck with the assistance of laparoscopy, and the abdomen is closed. Lateral anastomosis for esophageal cancer needs to be performed by a specialized doctor.