Abstract:Abstracts:At present,Many international important wetlands in China are losing and degrading, thus the ecological warning indicators and early warning mechanism for international important wetlands must be set up. According to principles of typicality, generality, quantifiable characters, scientific characters and operability, ecological warning indicators such as wetland area, the amount of water, surface water quality, the number of protected species, the population of waterfowls and vegetation coverage rate are selected in this paper by literature and experts consulting ,and ecological warning system for international important wetlands are established. The evaluation methods for the indicators and reactions for warning are also described. It aims to ensure reacting to the changes of the ecological status of wetlands in time and to ensure the maintaining of international important wetlands.