对昆明铁路分局1973～1986年底前的尘肺进行发病现状和规律的调查分析。结果昆明铁路分局累积尘肺病例169例，其中现患157例，死亡12例。矽肺为我分局的主要职业病，主要分布在隧道作业的凿岩工和石工。尘肺患者的病死率为7．64％。结核合并率为12．43％，分析了出现跳期的原因 Kunming Railway Branch from 1973 to 1986 the incidence of pneumoconiosis prior to the investigation and analysis of the status quo. Results A total of 169 cases of pneumoconiosis were found in Kunming Railway Branch Bureau, 157 of them were present and 12 died of pneumoconiosis. Silicosis is the main occupational disease in my branch, mainly in the tunneling operations of rock drillers and masons. The mortality rate of pneumoconiosis patients was 7.64%. Tuberculosis merger rate was 12.43%, analyzed the reasons for the jump