目的　改炉灶降砷效果探讨 ,及时为防制煤烟型地方性砷中毒提供依据。方法　对燃煤污染区进行改炉灶前后环境及食物砷含量对比调查。结果　南川、武隆、彭水各点改炉灶前室内空气含砷量均值分别为 0 0 2 0、 0 0 3 1和0 0 18mg/m3 ,超过国家居住区大气砷标准 (0 0 0 3mg/m3 ) 5 0～ 9 3倍 ,经改炉灶后依次降低 76 8%、 82 4%和87 4% ,煤炕玉米、辣椒含砷量与自然干燥比较 ,经t检验 ,各点均差异有极显著性意义 (P <0 0 1)。结论　改炉灶降砷是防治煤烟型地方性砷中毒的有效方法之一 Aim To discuss the effect of arsenic reduction on arsenic reduction in a timely manner and to provide a basis for the prevention of endemic arsenic poisoning in time. Methods A comparative survey of environmental and food arsenic contents before and after changing stoves in coal-fired pollution area was conducted. Results The arsenic content of indoor air in the stations of Nanchuan, Wulong and Pengshui was 0 0 2 0, 0 0 3 1 and 0 0 18mg / m3, respectively, which exceeded the standard of atmospheric arsenic of national residential area (0 0 3mg / m3) were 50 ~ 93 times, which were reduced by 76.8%, 82 4% and 87 4% respectively after changing the stove. Compared with natural drying, the arsenic content in corn, Significant significance (P <0.01). Conclusion It is one of the effective ways to prevent endemic arsenism in coal-burning type by changing the arsenic in the stove