Abstract:In recent years, insufficient protection or excessive utilization has caused widespread degradation of river ecosystems, affecting the natural and social functions of the river, losing the river's own value and endangering the river's health. Therefore, river ecological health assessment has attracted extensive attention. Due to sensitive geographical environment and fragile ecological environment of Xiong'an New Area, studying the health of rivers in Xiong'an New Area is of great significance to maintain regional water ecological balance, to implement Beijing-Tianjin-Hebei coordinated development strategy and to ease the non-capital function of Beijing. Taking four rivers in Xiong'an New Area as the research objects, based on GF-2 remote sensing image, geographic information data and measured data, river health assessment index system was constructed, which was composed of hydrology and water resources, river water quality, river sediment, river organism, river habitat and social service. Based on the comprehensive weight of each index obtained by subjective and objective assignment methods, the comprehensive health indexes of rivers were calculated to assess the health of rivers. The results showed that among the selected 19 sampling points in the river system of the Xiong'an New Area, 1 point was in the natural state, 3 points were in the healthy state, 6 points were in the sub-healthy state, 2 points were in the unhealthy state, and 7 points were in the morbid state. The health indexes of criterion level and comprehensive health indexes were different in different rivers. The comprehensive health index of Baigouyin River was 0.640, which was in healthy state. The index of Fuhe River was 0.484, which was in sub-healthy state, while Baohe River and Xiaoyi River were both in morbid state, with comprehensive health indexes of 0.269 and 0.228. It showed that there was obviously spatial heterogeneity in different sections of the same river and different rivers. The health status of Fuhe River and Baigouyin River was significantly better than that of Xiaoyi River and Baohe River. There was no difference in the health status of different sampling points of Xiaoyi River. There were certain differences in the health status of Baohe River, Fuhe River and Baigouyin River. The health status of the river entering the lake was generally better than that of the middle reaches. This river health assessment provided the reference for later ecological water demand and ecological function improvement of Xiong'an New Area.