Abstract: Fibrosis is a common manifestation of organ damage and failure. According to relevant statistics in the United States, deaths caused by fibrotic diseases account for 45% of all deaths in the country. Therefore, fibrotic diseases have received widespread attention worldwide. As a key kinase that regulates energy balance, AMP-activated protein kinase (AMPK), which mainly controls the transformation of cells from anabolic to catabolism, and restores the energy balance by phosphorylating its substrates. Therefore, it has become the core of treatment for diabetes and other metabolic-related diseases. Numerous recent pathological studies have shown that the expression of AMPK in fibrotic tissues is significantly down-regulated compared with normal tissues, and activation of AMPK could improve various fibrotic pathological processes (including autophagy dysfunction, oxidative stress, fibroblast proliferation, epithelial-mesenchymal transition, fibroblast-to-myofibroblast differentiation). Therefore, this review will discuss the structure and function of AMPK and its role in important phenotypes of fibrotic diseases, and provide evidence for AMPK as an important target for prevention and treatment of fibrosis.