Abstract: In order to provide a reference of reclamation and expansion of tidal flat for Spartina alterniflora in other coastal cities, the ecological formation process and temporal-spatial changes of S.alterniflora ecological community in tidal flats of the southern Zhejiang Provinve was explored and studied, as well as the advantages and disadvantages and the natural countermeasures of S. alterniflora on the ecosystem, the controllability of the growth of S.alterniflora in the reclaimed tidal flats in Wenzhou city by analyzing the environmental factors such as vegetation, soil, birds and benthic animals.