Abstract: Colorectal cancer is one of the most common malignant tumors of the digestive tract, and early diagnosis is essential. Dual-energy CT uses material characterization and material decomposition to depict lesions from the surrounding environment and identify benign and malignant cancer, which is expected to make up for the defects of conventional imaging techniques. To further improve the detection ability and diagnostic accuracy of colorectal cancer. This article reviews the research progress of dual-source spectroscopy CT in colorectal cancer.