Abstract The Western diet (WD) leads to hepatic lipid metabolism disorders. Previous studies have shown that the bile salt hydrolase 1 (bsh1) gene of Lactobacillus plantarum AR113 attenuates colitis under WD. In this study, we preliminarily explored how AR113 attenuates the hepatic inflammatory response in colitis mice on the WD. Our study suggests that the WD leads to abnormalities in hepatic lipid metabolism and dysbiosis of the gut microflora, and furthermore, there may be a correlation between abnormalities in lipid metabolism and hepatic inflammatory responses. AR113 significantly regulated lipid and bile acid metabolism in the liver of mice treated by WD and Dextran sulfate sodium (DSS), affected the structure of the mouse intestinal flora, and inhibited the expression of Sterol regulatory element-binding protein 1C (SREBP-1C) and P-NF-κB p65 at the protein level, thereby attenuating the hepatic injury phenotype. However, the bsh1 knockout strain did not exhibit the above function.