近几年，随着首都城市建设的不断发展，每年外地进京的建筑施工队伍(简称外施队伍)一直保持在60万人左右，他们分别来自全国的26个省、自治区和直辖市的190个县，从人员构成上看，90％以上均属于农民工。　　农村剩余劳动力的大量涌入，为北京市准备了丰富的建筑劳动力资源。但 In recent years, with the continuous development of urban construction in the capital, the number of construction and construction teams (referred to as “external troops”) who visit Beijing each year has remained at 600,000 or so. They are 190 from 26 provinces, autonomous regions and municipalities directly under the Central Government County, from the staffing point of view, more than 90% are migrant workers. The influx of rural surplus labor force has provided Beijing with abundant construction labor resources. but