Abstract: 【Objective】The accessibility of urban parks was measured on the basis of the distribution of accessibility and other realistic factors to locate the park and optimize the distribution of urban parks scientifically.【Method】On the basis of GIS network analyst techniques, Gaoyou City were used as a sample to calculate the accessibility of urban parks and evaluate accessible areas and populations from two aspects. The park site was selected on the basis of the distribution of park accessibility in combination with the distribution of population and spatial pattern of the urban river network.【Result】The park accessibility of Gaoyou City is not ideal, and the layout of the park is extremely uneven.The largest demand for parks is north of the Chengbei Area, the junction of the Chengdong and Chengzhong Areas, and north of the Chengnan Area. According to the natural characteristic of Gaoyou City and demand for parks, a new urban park should be constructed near the river area and the park system for “city river merge with green space” should be built.【Conclusion】Through assisting the quantitative data to the qualitative analysis, the use of digital technology was more humanized and scientific in the park location study and can better meet the needs of the residents.