[Conclusion] The main reasons of bronch fiberscope combines with hematorrhea were neoplasm in trachea, when endolbronchial and lung biopsy were taking, overstrain revoked to tear apart and rupture of blood vessel.

• 结论支气管镜检查并发大出血的原因主要是因为气管内新生物、支气管黏膜或肺组织活检时用力过度引起组织撕裂或血管破裂。