Intrahepatic cholangiocarcinoma MRI shows a low-signal lesion on T1-weighted image and a heterogeneous mass with peripheral high signal and central low signal on T2-weighted image. MRI is the best method to diagnose intrahepatic cholangiocarcinoma, which can show the anatomy of the liver and bile ducts and the extent of the tumor, and determine whether there are liver metastases. Magnetic resonance pancreaticobiliary imaging can better show the branches of the bile ducts, reflecting the extent of bile duct involvement, and has a high sensitivity for determining biliary obstruction. Compared with normal liver tissue, the tumor tissue shows a low signal lesion in T1-weighted image, and a heterogeneous mass with high signal in the periphery and low signal in the center in T2-weighted image. As the tumor tissue of intrahepatic cholangiocarcinoma is rich in fiber and has little blood supply, early enhancement is not obvious or shows delayed centripetal enhancement. The intrahepatic bile ducts around the lesion are mildly dilated, and the local hepatic peritoneum is retracted. If intrahepatic cholangiocarcinoma is suspected, it should actively receive standardized treatment.