目的　探讨胸部X线透视检查在儿童支气管异物诊断中的价值。方法　对 5 0例有异物吸入史或咳嗽、发热久治不愈的患儿行胸部X线透视检查 ,动态观察纵隔运动。结果　 5 0例均显示纵隔摆动 ,经支气管镜检查 ,其中 4 6例证实有支气管异物。胸部X线透视检查有纵隔摆动者的支气管异物阳性诊断率达 92 %。结论　胸部X线透视检查能动态观察纵隔活动情况 ,是诊断支气管异物的有效方法。 Objective To investigate the value of chest X-ray examination in the diagnosis of bronchial foreign body in children. Methods 50 cases of foreign body history of inhalation or cough, fever, long-term treatment of children underwent chest X-ray examination, dynamic observation of mediastinal movement. Results 50 cases showed mediastinum swing, bronchoscopy, of which 46 cases confirmed bronchial foreign body. Chest X-ray examination with mediastinum swing bronchial foreign body positive diagnostic rate of 92%. Conclusion Chest X-ray examination can dynamically observe the mediastinal activity, is an effective method of diagnosis of bronchial foreign body.