As electric vertical take-off and landing (eVTOL) aircraft technology rapidly advances from concept to commercial application, it will have a disruptive impact on future urban spatial structure and architectural form. This study proactively explores the development trends of vertical urban architecture driven by eVTOL transportation. Through a literature review, case analysis, and trend analysis, the paper focuses on three dimensions: spatial structural reconstruction, architectural form renewal, and addressing technical challenges. The study indicates that the focus of urban development will shift from horizontal to three-dimensional vertical space utilization; architectural spatial organization will evolve into a multifunctional, high-density integrated, and three-dimensional overlapping model; public space systems will break free from the constraints of traditional planar design and construct a global, three-dimensional, continuous roaming system; eVTOL transportation hubs will become core functional elements and new morphological landmarks; and architectural silhouettes will evolve towards topological three-dimensional contours, organic geometric forms, and diversified interface expressions. The study further identifies multiple technical challenges and proposes key research directions, including the development of a three-dimensional architectural space evaluation system and generative design methods integrated with eVTOL, to promote the transformation of future urban space provision models towards three-dimensional, efficient, and highly complex "vertical cities".