With the improvement of people’s living conditions, the standard of living is getting better and better, but some people will not pay attention to their health because of busy work or other reasons, and colon cancer will occur. In the early stage of rectal cancer, patients may have abdominal distension, discomfort and dyspepsia-like symptoms, followed by changes in bowel habits, such as increased stools, diarrhea or constipation, and abdominal pain before stool. Later on, mucus stool or mucopurulent blood stool can be found. 2, intestinal obstruction manifested as incomplete or complete low intestinal obstruction symptoms, such as abdominal distension, abdominal pain (distension or colic), constipation or stool closure. Physical examination shows abdominal bulge, intestinal shape, localized pressure pain, and hyperactive bowel sound can be heard. 3.abdominal mass is a mass of tumor body or infiltrated and bonded with omentum and surrounding tissues, with hard texture and irregular shape, some of them can have certain mobility with intestinal canal; in advanced stage, the tumor is more infiltrated and the mass can be fixed. 4.The early stage of colon cancer can show the symptoms of poisoning. The early stage of tumor ulceration, blood loss and toxin absorption often lead to anemia, low fever, weakness, emaciation and swelling, especially anemia and emaciation.