A comprehensive survey was carried out in 7parks of Tianjin and it is found that the Munan Park,the People's Park and the Bridge Park have more advantages in terms of water saving.Therefore,10 typical plant communities of them were chosen to analyze the plant species,growth status,community structure and environment,etc.In this paper,a reasonable evaluation system was established from ecological,ornamental and cultural factors which consist of 12 evaluation factors.Then,the Analytic Hierarchy Process(AHP)wa...