Abstract: With the aid of the pressure-state-response（PSR） model,factors affecting health of littoral wetland ecosystems were analyzed.Through questionnaire survey and expert interviews,the affecting factors were adjusted and tested by reliability and a health early-warning indicator system for littoral wetland ecosystems was constructed,and weights of the factors were determined with the AHP method.The health indicator system was divided into five levels.Taking Jiangsu for example,each indicator was given a health criterion of a corresponding level and an early-warning light panel was designed reflecting health of wetland ecosystems,which may be used as a basis for management of wetland and decision-making of competent authorities.