Objective:To investigate the diagnostic value of bronchial arteriography CT (BA-ACT) combined with bronchoscopy (BS) in bronchial Dieulafoy′s disease (BDD), and the role of bronchial artery embolization (BAE) in the treatment of BDD.Methods:Retrospective analysis was made on the clinical data of 5 patients suspected of being BDD treated by BS in Guangzhou First People′s Hospital or Guangzhou Thoracic Hospital from January 2008 to January 2018 due to hemoptysis. Bronchial arteriography (BAG) and BA-ACT were performed during the operation of interventional embolization. BAG rotary acquisition data were post-processed according to BS findings, and BA-ACT reconstruction images of the diseased bronchi and bronchial arteries were obtained. BS reexamination and clinical follow-up observation were carried out after embolization to analyze the effect of embolization.Results:There were one BDD lesion for the five patients respectively, and the BAG lacked characteristic manifestations. Bronchoscopy revealed BDD foci to present as papillary (case 1-case 3), nodular (case 4), or lirellate (case 5) subbronchial submucosal protrusion lesions. On the BA-ACT reconstruction plot, the BDD lesions of papillary, nodular and carination manifested correspondingly as a bronchial artery branches locally " pointed arch" shaped (cases 1-case 4) or " bead-like" (case 5) fold and protruding toward the bronchial lumen. The BDD lesions of the cases 1-case 4 retraction and disappearance after one BAE were observed by BS examination, and no hemoptysis recurrence during the follow-up period (54-91 months). The ridge like BDD lesion of the case 5 remained unchanged after BAE, and hemoptysis recurred at 71 months after the first BAE; the uncollapsed foci were supplied by two collateral vessels that confirmed by second BAG and BA-ACT, and no hemoptysis for 71 months followed up after second BAE.Conclusions:BA-ACT combined with BS enables a locative and qualitative diagnosis of BDD, and BAE is a very effective treatment method for BDD.