Abstract: Objective : To study the X-ray and CT diagnostic of esophageal cancer. Material and Method : 45 patients of esophageal cancer proved by pathology, before X-ray and CT examination. Results : 45 patients, 11 cases are in the upper segment, 18 cases in the middle segment, and 12 cases in the lower segment. The longest esophageal cancer in 45 patients is 11, esophageal wall abnormitily incrassated with ratrace and part, esophageal antrum changed stricture or obturation in different. Conclusion : There are much diagnostic acoupsur to esophageal cancer by X-ray. Both of X-ray and CT can help study the area and degree of esophageal cancer, and help clinic doctor to map out precept of treatment.