Early identification of colorectal cancer is a non-invasive, painless, non-invasive method and can be operated at home. By analyzing the genetic material (fecal DNA) in feces, normal cells and abnormal cells from precancerous lesions or tumors will also fall off and be excreted with feces. By detecting the hemoglobin and DNA fragments released by abnormal cells in these feces, we can find advanced adenomas and intestinal cancer lesions with a diameter of more than 65438±0cm, find the gene mutation of early intestinal cancer in time, and find intestinal cancer five years earlier. Really realize timely treatment.