The study of cultural and economic interactions in the southeastern part of the Iranian Plateau during the third millennium BCE is a key issue for understanding the processes underlying the formation of interregional exchange networks and the emergence of early urban societies. The two major archaeological sites of Shahdad, located in the Takab Plain, and Tepe Yahya, in the Soghan Plain, occupied strategically significant positions along the communication routes linking Central Asia, the Indus Valley, and Mesopotamia, and therefore played distinct yet complementary roles within these networks. The main objective of this research is to examine the economic and cultural status of each site within the Bronze Age exchange system and to analyze the nature of their relationships with neighboring regions. The study aims to provide a comparative analytical approach to archaeological data in order to identify patterns of production, distribution, and transmission of cultural elements across southeastern Iran. The central research question focuses on how differences in communication routes affected the economic organization, production technologies, and cultural expressions of the two sites. The working hypothesis suggests that Shahdad, through its direct connections with the Bactria–Margiana Archaeological Complex (BMAC), functioned as an intermediary center between Central Asia and the Iranian Plateau. In contrast, Tepe Yahya, with its extensive chlorite vessel production and administrative evidence, such as Proto-Elamite tablets and Persian Gulf , type seals, served as a major industrial and commercial hub along the southern trade corridor. The methodology relies on a comparative and interdisciplinary analysis of archaeological data from both sites and their contemporaneous neighboring regions. The results indicate that the cultural and material differences between Shahdad and Tepe Yahya reflect their participation in two distinct yet interconnected exchange systems. Consequently, Shahdad embodies the direct influence of Central Asian cultural elements, while Tepe Yahya retained structural ties with the Elamite, Mesopotamian, and Indus worlds. These findings demonstrate that southeastern Iran during the third millennium BCE was a dynamic intersection of independent yet interconnected cultural systems.