Abstract: Serial cultural heritages, as cross-regional cultural corridors, exhibit landscape patterns shaped by both natural constraints and human activities. The Shaanxi section of the Silk Road, a typical world cultural heritage corridor, experienced multiple disturbances from 1990 to 2025, including urban expansion and tourism development. This study aims to reveal the long-time-series evolutionary patterns and driving mechanisms of landscape patterns in heritage sites along the Shaanxi section of the Silk Road. To this end, a comprehensive analytical framework comprising the interpretation of long-time-series remote sensing images, landscape pattern quantification, and the identification of driving mechanisms was established. Based on multi-stage Landsat images from 1990 to 2025, this study conducted multi-scale quantitative analyses of seven heritage sites using random forest classification, land-use transfer matrix, landscape indices, and the Geodetector model. The results indicate that from 1990 to 2025, the study area exhibited overall aggravated landscape fragmentation, characterized by a decrease in cropland and increases in construction land, forest land, and grassland. These characteristics reflect the concurrence of urban expansion and ecological restoration. In terms of spatial evolution, significant differences were observed between the core and buffer zones. Specifically, the buffer zones experienced continuous fragmentation under external pressure from urban construction and tourism development, while the core zones exhibited overall stability with local drastic changes caused by periodic events such as the construction of archaeological site parks. Heritage sites at different geographical locations demonstrated significantly differentiated landscape patterns, which were dominated by policy-driven reconstruction with strong periodic adjustments, gradual fragmentation during urban expansion, and localized optimization driven by tourism development and ecological restoration, respectively at urban-center, suburban, and rural sites. The driving mechanisms underlying landscape patterns in the study area showed phased succession. From 1990 to 2000, tourism accessibility (q=0.165) and early economic activities (q=0.143) jointly drove the evolution of landscape patterns; from 2000 to 2015, economic expansion (q=0.192) emerged as the dominant driving force, and from 2015 to 2025, the driving mechanism transitioned to a dual-core pattern consisting of tourism development (q=0.310) and economic intensity (q=0.207). Overall, this study reveals the transition of landscape fragmentation in the Shaanxi section of the Silk Road from externally driven expansion to internally initiated functional reconstruction, providing a scientific reference for the zonal management, adaptive governance, and dynamic conservation of serial cultural heritages.