Urban park greenland is one of typical green open space. It is very important for the maintenance of urban ecological security and human health. Spatial pattern and accessibility of urban park greenland will directly affect service quality for city dwellers. In this paper, the features of spatial pattern, accessibility and its relationship with service level are analyzed in the center of Guangzhou city by using GIS with landscape indexes. The results show that: 1) Municipal park account for 84.71%of total area of urban parks in center of Guangzhou. Its contagion index is 92.44. The landscape type and spatial pattern of urban park greenland are less reasonable. 2) Based GIS network analysis, only 22.35%of the study area and 44.67%of residents can easily access urban park greenland. The accessibility of park greenland and its service quality of Guangzhou centre area are not good enough. 3) The number and distribution are important factors influencing the accessibility and service quality of urban park greenland.%公园绿地是城市中一类典型的开敞空间,对维护城市生态与人居环境健康具有重要意义,其空间布局的合理性与可达性直接影响其对城市居民的服务水平.以广州中心城区为例,借助GIS技术和景观格局指数,分析城市公园绿地景观格局、可达性和服务状况,并探讨城市公园绿地空间格局对其可达性影响.结果表明:①市级公园其面积占公园绿地总面积的84.71％,城市公园绿地聚集度为92.44,广州中心城区公园绿地景观类型和空间格局不尽合理；②网络分析表明研究区仅有22.35％的面积和44.67％的人口能够较便捷地到达邻近公园绿地,广州中心城区公园绿地的可达性和服务效果不理想；③城市公园绿地数量与空间格局是影响其可达性与服务水平的重要因子.
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