Background: Gastroesophageal reflux disease (GERD) is associated with hypotensive lower esophageal sphincter, frequent transient lower esophageal sphincter relaxation and esophageal hypersensitivity, and often precedes the development of Barrett's esophagus and esophageal adenocarcinoma. GERD is a very common diseased, and is on the rise worldwide. The purpose of this study is to investigate the pharmacological efficacy of Curcumae Longae Rhizoma 30% EtOH extract (CLR) on the chronic acid reflux esophagitis (CARE) rats. Methods: CLR was measured antioxidant activity, such as total polyphenol and total flavonoid contents, 1, 1-diphenyl-2-picrylhydrazyl (DPPH), and 2, 2’-azinobis-3-ethyl-enzothiazoline-6-sulfonic acid (ABTS) radical scavenging activity. And, to confirm the effect of CLR on esophageal in CARE-model, gross esophageal tissue was observed, and esophageal mucosal infiltration and inflammatory cell changes were observed under a microscope. We measured the level of reactive oxygen species (ROS) and peroxynitrite (ONOO-) in serum. Also, we measured the level of 2-thiobarbituric acid-reactive substance (TBARS) in serum and esophageal tissue. In addition, the antioxidant and inflammatory protein levels were investigated western blot analysis. Results: Administration of CLR to rats of induction of CARE was found to reduce esophagus tissue injury. ROS, ONOO-, and TBARS levels were significantly decreased in CLR compared with Veh rats. In addition, CLR was effectively reduced inflammatory protein, and increase antioxidant-related factors.Conclusions: Overall, CLR treatment suggested that markedly ameliorated the inactivation of NF-κB by blocking the phosphorylation of IκBα led to the inhibition of the expressions of proinflammatory proteins.