How long does it take to perform a laparoscopic gastrectomy cannot be generalized, it needs to be decided in conjunction with the specific type of surgery, the shortest is about 1 hour, the longest can be up to 3-4 hours. 1. Partial gastrectomy: For weight loss surgery or small gastric mesenchymal tumors, the time for laparoscopic gastrectomy is usually about half an hour to one hour. 2. Major gastrectomy: in case of gastric ulcer, duodenal ulcer and other diseases, it is necessary to remove a large part of the stomach, which usually takes about 2 hours. 3. Radical gastrectomy for gastric cancer: in case of gastrectomy for gastric cancer, due to the need to clear the surrounding lymph nodes, the operation time can reach 3 hours~4 hours or even longer. It should be noted that the time for gastrectomy varies from person to person, and the corresponding time will be different if the operation method is chosen under the comprehensive assessment of doctors.