Green infrastructure(GI) pattern plays an important role in the improvement of urban environment, economic and social development, and the promotion of urban image. Taking Hefei as the research area, Urban Green infrastructure(UGI) elements and ecological sources were extracted based on morphological spatial pattern analysis(MSPA), and nighttime light image data and slope data were used to correct the resistance surface generated by the habitat quality module in InVEST model. Then combining circuit theory, using Circuitscape software and Linkage Mapper tool to simulate the construction of UGI network and identify the key nodes in the ecological corridor. Finally, based on the spatial characteristics of patches, corridors and barriers, the optimization strategy of Hefei's urban green infrastructure network pattern is proposed. The results indicated that:(1) the UGI network in Hefei is composed of 120 ecological source patches, 4442.4km² corridors and 62 barriers. Most of the ecological patches are small and scattered, and the concentration of ecological patches in the south is better than that in the north. The ecological corridor is distributed in the ring outside the main urban area of Hefei, which is concentrated in the East, North and south of the city respectively, and the overall connectivity of the network is low. Most of the barriers are distributed in the edge of the ecological source area or ecological corridor, mainly for construction land and road land. The area of barriers below the average resistance value accounts for 71.1% of the total area of barriers, which is relatively easy to restore; (2) The existing important ecological corridors in Hefei are mainly distributed in the northeast of Lake Chaohu, the northwest of Lake Chaohu and the south of the city. The corridor connection in each region is self-contained and does not form an overall network connection. According to the corridor analysis, the corridor optimization strategies of protecting 72 important ecological corridors and restoring 11 potential ecological corridors are proposed. (3) According to the analysis of barriers, 615.6km² of primary improvement area, 1818.3km² of secondary improvement area and protection area are divided. The research based on MSPA-CIRCUIT model construction provides an important method support for Hefei's future UGI construction and its optimization path, and also provides reference for UGI network construction and optimization in other regions. Under the guidance of the new development concepts, urban green infrastructure will highlight the value compounding and sustainable utilization guided by the promotion of human well-being.