How long can colorectal cancer patients live after surgery? According to research and many clinical experiences, the 5-year survival rate of colorectal cancer after surgery is significantly higher than that of solid malignant tumors such as stomach, lung, liver and esophagus. With the improvement of medical level, the 5-year survival rate of rectal cancer has increased from 50% to 70%, and the 5-year survival rate of colon cancer has increased from 70% to 80%. Since recurrence and metastasis still occur after radical colorectal cancer surgery, this is the key study on how long one can live after colorectal cancer surgery. The recurrence after surgery is caused by the residual cancer cells in the body, which may be due to the failure to detect the hidden metastases before surgery or the failure to completely remove the lesions during surgery. Therefore, before dissection, intra-intestinal chemotherapy or preoperative enema administration for rectal cancer can stop the spread of cancer cells, kill and destroy cancer cells. Continuing chemotherapy treatment after surgery has the potential to improve the 5-year survival rate of colorectal cancer after surgery. For patients who cannot be handled by surgery or to prevent metastasis after surgery, only chemotherapy can be continued again, in fact, the effect is generally less satisfactory. So, is there any better treatment method? Patients with post-operative and post-operative metastasis of colorectal cancer can receive synergistic anti-cancer effects, reduce the toxic side effects of chemotherapy, improve the efficacy and long-term survival rate, and reduce tumor recurrence by combining biological therapy technologies, such as biological cell therapy and biological targeted therapy, in the process of chemotherapy. In the field of Chinese medicine, molecular biology studies in recent years have shown that colorectal cancer has cancer cell dissemination in the early stage, and there are often multiple tiny metastases at the time of surgery. In the middle stage, 25% and in the late stage, 50% eventually die from systemic cancer dissemination. Therefore, the use of Chinese medicine for post-operative treatment of surgical patients has been proved by numerous clinical studies to increase the 3-year survival rate by about 20% and the 5-year survival rate by about 10%, and can significantly reduce local recurrence.