The historical survey of the remaining stations of the South National Railway in Khuzestan province (1307-1317) shows that the construction of these platforms on the North-South railway route led to the formation of a new chapter of historical-architectural developments in different regions of this province. This article aims to answer the question by using the descriptive-analytical method and relying on library sources, documents and field observations, what patterns and architectural components and historical functions do Khavar, Bamdej and Ahoudasht railway stations have? The findings show that the architecture of the mentioned stations was built by foreign companies, departing from the traditional style of Iranian architecture, under the influence of modern European architecture and suitable for the climate of Khuzestan. These buildings have undergone changes in the three periods of the first Pahlavi period, the second Pahlavi period and the Islamic Republic in terms of the type of use, architectural shape and style, and physical expansion. The architectural space of these stations evokes industrial progress and reflects the effort to preserve the national identity in the process of modernization. Also, the establishment of the security and law enforcement institutions of the central government in the region, the powerful presence of the central government with the help of visual symbols in the form of new architecture, facilitating a kind of cultural and social fusion of the people of this region with other parts of the country, helping the movement of goods and economic prosperity, monitoring the main oil artery and finally playing a role in the Second World War, the most important historical functions of the construction of these stations have been. Most of these roles have been aimed at helping the nation-building project of the Pahlavi government to organize border and insecure areas of the country in order to maintain national unity.