The construction of green park space re ects the overall environmental level of the city and re ects the quality of residents' living environment. It points out that it is not accurate to use the per capita indicators of urban park green space to evaluate the urban green space environment's actual effect. Some central urban park green spaces have an obvious imbalance in distribution, and the imperfect transportation facilities have also led to "service blind spots" in the green spaces. The article selects and extracts multi-source network data, uses ArcGIS analysis tools to analyze the overall layout and accessibility of the central park green areas within the principal city of Kunming from the macro and meso level, and uses grid overlay tools to analyze urban park green areas "service blind zone" to identify, put forward suggestions to optimize park green space layout and accessibility, and eliminate the suitability of park green land "service blind zone".