Abstract: The urban green space system is an important component in the construction of the urban sponge system. It is more in line with the requirements of sustainable development to improve the overall stagnant storage capacity of the city through the optimization of the green space landscape pattern. This paper takes the built-up areas within the third ring road of Shenyang as the study area, and applies the landscape pattern index method to evaluate the green space landscape pattern at the urban area and site scales. It uses mathematical statistics methods such as correlation analysis and regression analysis to evaluate the two research scales, and analyze the relationship between green space landscape pattern and waterlogging risk. It concludes that on the urban scale, the impact of various types of green space landscape pattern indexes on the stagnation capacity of green land is as follows: green land scale characteristic index > green land morphological characteristic index > green land distribution characteristic index. On the site scale, the order of impact of various green land landscape pattern indexes on the stagnation capacity of green land is as follows: green land distribution characteristic index > green land scale characteristic index > green land morphology characteristic index. Through quantitative research, it obtains the influence of different scales of green space landscape patterns on the retention capacity, which provides reference for the planning and management of different levels of green space system layout in future sponge city planning.