Pediatric liver tumors are also relatively common, divided into benign tumors and malignant tumors, with malignant tumors predominating. Pediatric primary malignant tumors are most common in hepatoblastoma, benign tumors are mainly seen in malignant tumors, liver metastases are mainly caused by neuroblastoma, often primary neuroblastoma can not be found, but metastatic tumors are very large. The etiology of hepatoblastoma in pediatric patients is not well understood. Most of the researches think that the causative factors are as follows: 1) cirrhosis of liver, 2) viral hepatitis, especially hepatitis B, hepatitis E, etc., and long-term consumption of food containing aflatoxin, 3) chemistry can lead to the formation of carcinogenicity, such as frequent nitrate or nitrite food, such as long-term pickled pickles, which are prone to contain carcinogens, 4) low immunity of the body, which can also lead to the formation of pediatric liver tumors, especially the metastatic tumors. liver tumors in children, especially malignant tumors.