The incidence and mortality rates of colorectal cancer (CRC) in China have been on the rise, and in 2011, the incidence and mortality rates of CRC were 23.03 per 100,000 and 11.11 per 100,000 respectively. In 2011, the incidence rate and mortality rate of colorectal cancer were 23.03 per 100,000 and 11.11 per 100,000, respectively. Among them, the incidence rate of colorectal cancer in urban areas is much higher than that in rural areas, and the incidence rate of colorectal cancer has been rising significantly, with the majority of the patients found to be in the middle or late stage. The following diagram is selected from the new national diagnosis and treatment standard of colorectal cancer, let’s take a look at the diagnosis and treatment process of colorectal cancer together. 1.Diagnosis of colorectal cancer 2.Treatment of stage I colorectal cancer 3.Treatment of stage II-III colorectal cancer 4.Treatment of stage II-III rectal cancer 5.Treatment of liver and lung metastasis of resectable colorectal cancer 6.Treatment of liver and lung metastasis of non-resectable colorectal cancer 7.Treatment of heterotopic metastases of colorectal cancer