Background To analyze and summarize the changes of the bronchus and vessels of right B2 downwards-shift. Methods Patients who underwent three-dimensional computed tomography bronchography and angiography (3D-CTBA）Between January 2019 and January 2022 were screened. Based on the opening position of B1+3, we classified bronchial variations into normal type, over type, and tracheal-bronchus type. Results Initially 5 280 patients were screened, and finally 6 patients were included, including 1 male and 5 females, aged 29 to 71 years. According to our bronchial classification, there were 4 (66.7%) patients of the normal type in this group, 1 (16.7%) patient was the over type;1 patient (16.7%) was the tracheal-bronchus type.In artery, 4 (66.7%) patients was the Tr.sup+A.post type and 2 (33.3%) patients was the Tr.sup+Tr.inf+A.post type have. In vein, 2 (33.3%) patients was the Ⅰab+UVPBI type, 1 (16.7%) patient the Ⅰb+UVPBI type, 1 (16.7%) patient the Anterior+UVPBI type have, 1 (16.7%) patient the Central+UVPBI type and 1 (16.7%) patient the Central type. Conclusion There is a variation combination in the right B2 downwards-shift: the right B2 downwards-shift, exist posterior artery(A.post), the posterior oblique fissure is poorly developed(RS2 and RS6 are interconnected).Therefore, it is easier for us to dissect and disconnect B2 intraoperative, but it is necessary to be vigilant for vascular damage caused by opening the posterior oblique fissure.