Barrett’s esophagus endoscopic treatment method I: Principle: The principle is mainly to eliminate columnar epithelium by various physical or chemical methods and induce regenerative repair of squamous epithelium. Methods: 1. Laser treatment: The more applied laser is Nd-YAG laser, which has deeper tissue damage. The KTP laser is a green 532 nm laser that is inserted into the 1064 nm infrared light column of the Nd-YAG laser, which is very effective in eliminating superficial tissues and has little damage to deeper tissues. Multiple treatments are often needed. 2.Multipolar electrocoagulation (MPEC): Studies have shown that MPEC combined with acid suppressants can reverse Barrett’s esophagus. 3, argon plasma coagulator (APC): APC is similar to MPEC, and is a new non-contact coagulation method, which can transmit high-frequency electrical energy to the surface of the target tissue through ionized argon gas to cause coagulation and denaturation; the treatment depth can be controlled at the mucosal layer of about 0.4 cm, therefore, complications such as bleeding and perforation The incidence of complications such as bleeding and perforation is low. However, after reviewing the relevant literature and performing statistical analysis, it was found that there was no difference in the treatment effect between APC and MPEC in the group.