Objective To summarize the CT signs and clinic characteristics to improve the CT diagnoses ability on the lobar bronchial intraluminal cancer and provide a well comprehension for it.Methods To study the clinical symptom and CT presentation in 7 cases with the lobar bronchial intraluminal cancer which had been confirmed by bronchoscopy and pathologic exam.Results 3 cases were in right superior lobaris bronchus,1 case in right middle lobaris bronchus,3 cases in left superior lobaris bronchus.Obstructive pneumonia were found in 7 cases.Obstructive atelestasis in 5 cases.The nodules or emboluses within lobaris bronchus were showed by CT in all cases and the obstructive signs on each patient in its degrees. Conclusion To get the CT diagnosis of the lobar bronchial cancer is easily be delayed. But if pay attention and keep it a close combination with clinic, the early diagnosis will be attained on time.