Rural - urban broad and diverse relationships and interactions have important effects on human settlements in the form of population flows, goods, capital, information, innovation and ideas. Many of the developments that occur in towns and villages are results of rate and way of interactions between these spaces. The aim of this study is to evaluate the factors and mechanisms affecting rural- urban linkages of Karaj Metropolitan and surrounding villages and the impact of these links on rural spatial organization in the framework of regional network approach. The statistical sampling for this research comprised of 11 villages of Mohammad Abad district among them six villages have been chosen as a case sample using estimation method. Also, according to the survey purpose, 342 households were selected as sample using Cochran formula. Research samples were selected (both village and household) using distance and random sampling methods, respectively. Collecting information in this article has been carried out based on library and field studies. In field studies, required data and information have been collected using questioning and observation techniques and tools, such as questionnaires and observation card. Descriptive and inferential statistics, TOPSIS technique and SPSS software has been used for data analysis. Research findings show that, spatial flows, especially those of capital and people (population) interactions in the rural - urban area of study provides strong, physical- spatial changes (system of land use, housing, etc.) .But these developments have not positive in all dimensions and in all the villages and negative developments have followed as well (including land use changes in pomology and olericulture farming areas, and   urban stlyle housing patterns) In fact, the lack of spatial planning  for shaping organized and controlled flows and connections, as well as ignorance about the role of Karaj and its surrounding rural settlements has led to shortcomings is management of flows and connection modalities, and has therefore prevented development in the region.