As a genre integrating oriental fantasy characteristics and narrative tension, xianxia dramas construct a self-consistent narrative system through their narrative time and space, which is distinct from real-world cognition. Unlike realistic dramas that adhere to the linear flow of time and the physical properties of space, xianxia dramas not only establish the basic framework of the immortal world by reconstructing the temporal dimension and fabricating the spatial dimension but also transform time and space from mere background elements into narrative driving forces. Given the foundational and dynamic value of time and space in the plot narration of xianxia dramas, the following discussion will focus on the two key dimensions of "narrative time" and "narrative space" for a systematic exposition. By decomposing these two dimensions, the study aims to reveal the interactive relationship between time and space in xianxia narrative, as well as their joint support for the fantasy and cultural nature of xianxia narration, thereby deepening the understanding of the narrative logic of xianxia dramas.