熙春园遗址位于北京市海淀区清华大学范围内，作为少有的清代小型皇家园林遗存，在校园建设发展过程中，这一区域始终是校园核心功能与景观风貌的重要组成部分。熙春园的空间结构变迁研究，对于补充清华大学建校空间前史、清代小型皇家园林研究均具有重要意义。 本文以解读熙春园空间结构变迁特征为目标，意图建立较为完整的熙春园营建工程时间轴，归纳熙春园营建特征，复原熙春园主要节点风貌，并评价熙春园二十余年研究的阶段性进程。研究的时间范围从康熙四十六年园林初建开始，至宣统元年清华园改建学堂为止（1707-1909年），空间范围为样式雷图档反映的熙春园园林范围。在研究内容方面，本研究扩大资料范围，进一步收集了更大范围史料，如熙春园及圆明园范围的样式雷图档、内务府营建奏折、清代文献等第一手资料，并总结了熙春园二十余年研究的工作路径与空间结论。 本文的主要研究成果如下： 第一，梳理了熙春园从康熙四十六年至宣统元年（1707-1909年）的营建历程。解读了第一手资料之中反映的熙春园营建工程信息，纠正了前序研究之中熙春园样式雷图档断代的不够严谨之处。 第二，归纳了熙春园营建工程的类型特征和空间结构变迁的阶段性特征。划分了具有普适性的北京西郊皇家园林营建工程类型，归纳了具有特殊性的熙春园营建阶段：赐园创建到消隐（1707-1767年）、御园联系与增华（1767-1803年）、御园承继与添改（1803-1821年）、赐园分建到拆修（1821-1909年）。 第三，选取了熙春园9个代表性空间节点，综合多种资料，复原了各节点的典型空间格局风貌，改进了前序复原结果的不准确之处；探索了各节点的变迁历程，分析了节点建设时间、存续时间、主要功能、营建目的、空间结构、变迁特征等内容。 第四，回顾了熙春园二十余年的研究历程，评价了熙春园研究的阶段性进程。讨论了部分不够严谨的熙春园早期研究结论，并结合更大范围资料，提出了新的猜想。

Xichun-Yuan site is located within the boundaries of Tsinghua University in Haidian District, Beijing. As one of the few small royal gardens of the Qing Dynasty, this area has always been an important part of the core functions and landscape of the campus during its development. The study of the spatial structure of Xichun-Yuan is of great significance in complementing the spatial history of the founding of Tsinghua University and the study of small royal gardens of the Qing dynasty. This paper aims to interpret the changing characteristics of the spatial structure of Xichun-Yuan, to establish a more complete timeline of the construction of Xichun-Yuan, to summarise its construction characteristics, to restore the main nodes of its landscape, and to evaluate the stages of the research process of Xichun-Yuan over the past twenty years. The study covers the period from the first construction of the gardens in the 46th year of the Kangxi era to the conversion of the Qinghua-Yuan into a school in the first year of the Xuantong era (1707-1909), and the spatial extent of Xichun-Yuan as reflected in the Yangshilei blueprints. In terms of research content, this study further collects first-hand information on a wider range of historical materials, such as the Yangshilei blueprints of the Xichun-Yuan and Yuanming-Yuan area, the internal affairs department‘s construction documents, and Qing dynasty literature, etc.And this study summarises the working path and spatial conclusions of over twenty years of research on Xichun-Yuan. The main findings of this paper are as follows: First, the history of the Xichun-Yuan from the forty-sixth year of the Kangxi era to the first year of the Xuantong era (1707-1909) is examined. The first-hand information on the construction of the Xichun Garden has been interpreted, and the lack of rigour in the Yangshilei blueprints of Xichun-Yuan in the preceding study has been corrected. Secondly, it summarises the typological characteristics of Xichun-Yuan‘s construction works and the stages of change in spatial structure. It delineates the types of construction work that were common to the royal gardens in the western suburbs of Beijing, and summarises the stages of construction of Xichun-Yuan that were specific to it: the creation of the Garden of Giving to its disappearance (1707-1767), the connection and addition of the Royal Garden (1767-1803), the succession and addition of the Royal Garden (1803-1821), and the division of the Garden of Giving to its demolition (1821-1909). Third, nine representative spatial nodes of the Xichun-Yuan are selected, and the typical spatial pattern of each node is restored by combining various sources to improve the inaccuracies of the previous restoration results; the history of the changes of each node is explored, and the construction time, survival time, main functions, purpose of construction, spatial structure and characteristics of changes of each node are analysed. Fourthly, the research history of Xichun-Yuan over the past twenty years is reviewed, and the phased process of Xichun-Yuan research is evaluated. Some of the less rigorous conclusions of early research are discussed, and new conjectures are proposed in the light of wider information.