Abstract: The investigation was taken into plant Community Park green space of Shanghai.The paper analyzed the factors such as community density, the crown of trees and various trees, which have influence on the community landscape and some typical plant communities were discussed separately by the methods of ecology landscape architecture. It listed several community structure patterns and technology ways of optimization adjustment for plant community which is suitable for park green space of Shanghai in order to meet the requirement of the construction of park greening of Shanghai better and offer some advice on the construction of the urban ecology landscape architecture.