Abstract: Rapid urbanization accelerates the evolvement of urban landscape through urban function upgrading and spatial configuration renewing. However, the consequent eco-environmental problems, such as landscape fragmentation and heat island effect, have negative effects on the development of urban landscape. Therefore, the spatial optimization of urban landscape should take the economic and ecological needs into account, and propose ecological approaches for solving eco-environmental problems. Through analyzing the present status of the elements and configuration of urban ecosystem, the relationships among the elements were illuminated, aimed to protect the environment and promote the open spatial value of cities through optimizing urban framework. Taking Shenzhen of the Mainland and Wuxi of Taiwan, the two cities with stable economic development and well environment as study cases, their ecological function networks were evaluated by cost distance model, and the results showed that the urban ecological function networks in Shenzhen and Wuxi were significantly affected by urban development, with the location of their ecological center and economic center polarized obviously. The ecological center was far away from the transmission center, and the ecological functions flow and transmission had to depend more on the ecological components and unblocked structure within the areas of the cities. It was suggested that urban framework should be strengthened to promote urban ecological function, with the landscape units optimized and the key network nodes unblocked, which in turn could optimize urban landscape.

Key words: Artificial tending, P. tabulaeformis forest, Structural characteristics of forest, Forest management