In the context of increasingly prominent urban ecological environment problems, how to construct a multi-functional coupled green space ecological network pattern is an important issue for promoting the sustainable development of the human settlement environment. Taking Chengdu City as the research area, based on the source-sink theory, Morphological Spatial Pattern Analysis (MSPA), landscape connectivity index, circuit theory, and other methods were comprehensively used to construct a single-factor network for functions such as biodiversity protection, thermal environment improvement, and recreational services. The characteristics of spatial elements, including source areas, corridors, and ecological strategic points, were analyzed. Finally, a multi-level and multi-functional ecological network optimization pattern based on the coupling of ecology-climate adaption-recreation was formulated. The results showed that:(1)Source-sink landscapes were selected(ecological landscape 159-29, climate adaptability 30-14, and recreation 208-40). Biological migration corridors were clustered in the middle and southwest of the study area, while climate adaptability corridors were concentrated in the middle and sparse in the east and west. Recreation corridors were relatively dense, with the central city as the core and extending to the surrounding areas.(2)In the multi-level source-sink landscape network, the overall length in descending order was recreation corridors>biological migration corridors>climate adaptability corridors; the total area in descending order was biological migration corridors>recreation corridors>climate adaptability corridors. The suitable widths of the first and second ecological corridors were 200 and 100m; climate adaptability corridors should be 100 and 60m wide, and recreational corridors were 60 and 30m wide.(3)By superimposing multi-objective landscape corridors, 753 key ecological points and 2371 interference points were obtained. Nearly 8.18% of the area in the recreation source areas should be given back to ecological corridors and climate adaptability corridors. The multi-functional coupled ecological network optimization pattern could activate the potential value of different landscape resources, which is of great significance for coordinating the bidirectional needs of ecological protection and urban development, achieving the optimal allocation of green space resources in urban space.