ABSTRACT Colorectal cancer is a common malignant tumor worldwide. The prognosis of patients with colorectal cancer peritoneal metastasis is very poor. The study of the specific mechanisms of colorectal cancer peritoneal metastasis plays an important role in the treatment of patients with this disease. The mechanisms of colorectal cancer peritoneal metastasis are mainly pathological and biological. Biologically, the epithelial–mesenchymal transition process is an important precursor to tumor cell metastasis. Therefore, it is necessary to study the mechanisms of colorectal cancer peritoneal metastasis, especially the epithelial–mesenchymal transition, to identify new methods for the prevention and treatment of colorectal cancer peritoneal cancer, reduce the incidence of colorectal cancer peritoneal metastasis, and improve patient prognosis.