笔者以天山北坡经济带11市县的城乡区域系统为研究对象，采用主成分分析法对该区域城乡关联发展水平进行了定量评价，以期为天山北坡经济带城乡区域系统的协调发展提供依据。研究表明：城乡关联度与城市化水平和人均GDP有着密切关系，呈正相关性；天山北坡经济带城乡关联发展水平具有显著的等级和空间差异；而且，采用主成分分析法对天山北坡经济带城乡关联度的量化分析与与该区域城乡关联发展的实际水平基本相符，表明主成分分析法对城乡关联发展的定量分析是可行的。

In order to provide theoretical basis for the harmonious development of urban-rural regional system in northern slope economic zone of Tian Mountain, the quantitative evaluation of urban-rural related development was conducted by the main elemental analysis in this article. The results indicated that urban-rural related degree is much closely related to the urbanization level and per capita GDP, which is present positive relevance, and significant grade and spatial discrepancies were found among the urban-rural related developmental levels in northern economic zone of Tian Mountain. Furthermore, the results obtained by main elemental analysis are basically consistent with the current urban-rural related developmental level in northern slope economic zone of Tian Mountain, which indicated that the quantitative evaluation of urban-rural related development by the main elemental analysis is feasible.