中文摘要：

综合考虑西南地区3省1市的煤田地质储量、产量、地质时代和煤阶，对西南地区3省1市41个煤样进行砷分析测试．实验表明，煤中砷平均含量为7．03mg／kg，高于中国煤砷含量4．70mg／kg以及世界煤砷平均含量5．0mg／kg．在地域分布上，以云南省原煤砷平均含量为最高．在成煤时代中按照晚二叠世、晚三叠世、第三纪依次升高．在此基础上，分析了西南地区煤中砷富集的因素以及砷的赋存状态，认为砷富集的主要因素是构造运动，且砷赋存状态多种多样．

英文摘要：

Forty- one coal samples collected from Southwestern were measured. The mean of arsenic in Southwestern coals is 7.03 mg/kg. The level of arsenic contents is higher than China coals and world coals. From the result, the richest content of arsenic is located in Yunnan province. In three main coal - forming periods, the arsenic contents decrease from Tertiary, Late Triassic to Late Permian. Moreover, the enrichment factors and the occurrence of arsenic were analyzed in the paper. The results show that the main factor is tectonic movement and the occurrence of arsenic is various.