Colon cancer (colorectal cancer) is one of the common malignant tumors in the gastrointestinal tract, accounting for the second place of gastrointestinal tumors. The most common site is in the rectum and the junction of rectum and sigmoid colon, and the highest incidence rate is between 40-50 years old, accounting for about 60%. The ratio of men to women is 2:1, and the cause of the disease is not yet clear. A large amount of information confirms that due to changes in living conditions and habits teenagers and children are extremely rare and less than 1% of colon and rectal cancers occur in pediatric patients. However, some diseases, such as familial polyposis, have been recognized as pre-cancerous lesions: colon adenoma, ulcerative colitis and colonic schistosomiasis sarcoidosis, are more closely related to the occurrence of colorectal cancer. Colorectal cancer is one of the main malignant tumors that endanger human health, and the systemic symptoms can include anemia, emaciation, weakness, etc. Cachexia can appear in the late stage, and lymphatic metastasis is the most common in colorectal cancer.