Stone reliefs of the Han period are essentially linked to architectural ecoration of the period. It is therefore the aim of this paper, to describe the concept of the closed space in ancient China through an analysis of the evolution of its architectural space. The crucial role of the "forbidden entrance", stresses the importance of the decoration of the tomb door. The tomb door, apart from being a space limit, is namely the place of passage between life and death, and is imbued with ideas of the Han People regarding the burial ritual and life after death. The author therefore aims to analyze the art of door decoration from the perspective of the "concept of space". The author will first offer a review of research on door decoration, and will then proceed with an analysis of the visual aspects of these reliefs, which will be divided into three categories and seven types. Through an analysis of the spatial symbolism of tomb door decoration, the author will touch upon he symbolic meaning and evolution of Han urban and tomb space. By way of analysis of evil-repellant images and symbolism pertaining to the realm of immortals, this paper will moreover offer an indepth discussion of the iconology and spirit of Han tomb door decoration, especially of the tomb door as simulation of a ritual ascendance to the immortal realm.