Carcinoembryonic antigen (CEA) value is greater than 1,000, which is generally regarded as the possibility of malignant tumors, and should be examined in time to clarify the cause, and corresponding treatment measures should be taken according to the different causes of the disease, such as surgical treatment, medication, and local treatment. Carcinoembryonic antigen (CEA) is a commonly used tumor marker, with normal value <5ug/L. Significantly elevated CEA is usually found in colorectal cancer, gastric cancer, pancreatic cancer, hepatocellular carcinoma, lung cancer, breast cancer, and medullary thyroid carcinoma, etc. In addition, a mild increase in CEA is usually considered as the cause of malignancy. Mildly elevated carcinoembryonic antigen is also seen in certain benign gastrointestinal diseases such as intestinal obstruction, biliary obstruction, pancreatitis, cirrhosis of the liver, colonic polyps, ulcerative colitis, as well as in smokers and the elderly. Carcinoembryonic antigen value greater than 1000 belongs to the obvious elevation, mostly consider the tumor disease, suggest that the patient further improve the relevant examination to clarify the cause of the disease, and actively take surgery, drugs and other treatments, in order to avoid delaying the condition.