Gastroesophageal reflux (GERD) is a common gastrointestinal disorder, especially in morbidly obese patients. Because morbidly obese patients have relatively high intra-abdominal and intra-gastric pressures, the gastro-esophageal pressure gradient increases, and because they prefer high-fat diets, gastric emptying slows down, making them more likely to suffer from gastro-esophageal reflux. For morbidly obese patients with gastroesophageal reflux, treatment through bariatric surgery can often get better results, but more attention should be paid to the choice of surgery. The two commonly used weight loss surgeries in China are sleeve gastrectomy and gastric bypass surgery. Sleeve gastrectomy is favored by many doctors as well as patients because of its simple surgical principle and fewer complications. However, according to many clinical cases, after sleeve gastrectomy, many patients have increased pressure in the gastric cavity in the short term, and a small number of patients also have symptoms of gastroesophageal reflux (GERD). If the patient had GERD before the surgery, it is likely that the situation will worsen during the immediate post-surgical period. Gastric bypass surgery is often recommended for patients with GERD. Not only does this procedure provide better weight loss than sleeve gastrectomy, it is also more effective in relieving GERD when the diet is followed. However, the results of both procedures are dependent on the surgeon who performs the surgery. A skilled surgeon will be able to use his or her experience to minimize these complications, resulting in a better surgical experience for the patient and less disruption to normal life after the surgery.