基于2020年中国人口普查分县资料、自然地理和经济社会发展数据，采用Moran’s I指数、不均衡指数、冷热点分析和地理探测器等方法分析了西安都市圈三次产业人口分布特征、空间联系与影响因素。结果表明，农业人口主要分布于都市圈外围且密度较低，工业人口聚集在都市圈核心圈层及其周边，服务业人口以都市圈核心圈层为中心高度集聚。农业人口分布的主导因子为地形起伏度等自然地理因素，工业和服务业人口分布的主导因子为城镇化率、夜间灯光指数等经济和社会因素。三次产业人口分布演化具有内在联系，都市圈核心圈层的功能和作用在工业和服务业人口集聚效应的推动下持续强化。

Based on the China Population Census by county, natural geography and economic and social development data in 2020, we used Moran's I index, imbalance index, cold and hot spot analysis, GeoDetector and other methods to analyze distribution characteristics, spatial relation and influence factors of industrial population in the Xi'an Metropolitan Area. The results indicate that the agricultural population is mainly distributed in the periphery of urban areas with relatively low density, while the industrial population tends to gather in the core circle and its surrounding areas of urban areas, and the service industry population is also highly concentrated around the core circle. The dominant factors for agricultural population distribution include natural geographical factors such as terrain undulation, while the dominant factors for industrial and service industry population distribution include economic and social factors such as urbanization rate and nighttime light index. The population distribution of three industries has an inherent connection with development and evolution. The functions and roles of core circle layer of metropolitan area have been continuously strengthened under the promotion of the agglomeration effect of the industrial and service industry population.