目前粤港澳大湾区正在加快建设世界级城市群，该区域的高速铁路进入快速发展阶段。为研究高速铁路线网格局对城市空间重构的影响，以粤港澳大湾区（以下简称大湾区）为研究区域，采用2009和2019年大湾区铁路时刻表数据，通过比较研究分析普速铁路与高速铁路对于地区可达性与联系紧密度的影响。结果表明：高速铁路极大地减少了城市之间的列车出行时长，同时产生了“时空收敛”的不均衡效应，城市可达性水平以中心城市广州、深圳、香港为中心向外围递减；广、深、港三个中心城市以高速铁路网络为依托重塑一日交流圈，范围均已扩大至整个大湾区；大湾区各城市之间的空间联系强度表现出多核心、多层次的结构特征，整体上联系格局正趋向网络化发展；在两个研究时间点，大湾区空间联系均表现出“东岸集中、西岸和边缘稀疏”的特征。

At present, the Guangdong-Hong Kong-Macao Greater Bay Area is speeding up the construction of world-class city clusters, and the region's high-speed railway has entered the explosive development stage. In order to study the influence of high-speed railway network pattern on urban spatial reconstruction, the Guangdong-Hong Kong-Macao Greater Bay Area(hereinafter referred to as GBA) was taken as the research area, and the railway time data of 2009 and 2019 were used to obtain the influence of universal railway and high-speed railway on urban accessibility and connectivity through comparative analysis. The results show that the high speed railway greatly reduces the railway travel time between cities and produces an unbalanced effect of "spatiotemporal convergence". Relying on high-speed railway network, the three central cities of Guangzhou, Shenzhen and Hong Kong rebuilt the one-day exchange circle, which has expanded to the whole greater bay area. The spatial connection pattern of the GBA is multi-core and multi-layered. In the two research points, the spatial connection of the GBA shows the characteristics of "the east coast is dense, the west coast is sparse and the edge is sparse".