The Wnt signaling pathway plays an important role in maintaining liver homeostasis and liver regeneration. In healthy livers, the Wnt signaling pathway is mostly inactive, but it is continuously overactivated during cell renewal or regeneration processes, as well as in certain pathological conditions, diseases, precancerous states, and cancers. Persistent liver cell injury often leads to chronic liver diseases such as liver fibrosis, liver cirrhosis, and liver cancer. This article summarizes the basic structural features of the Wnt signaling pathway and analyzes its important role in the pathological progression of various liver diseases, so as to provide new ideas for the prevention and treatment of liver diseases in clinical practice.