Based on the"economy-society-nature"model,the ecological vulnerability assessment index system of Anhui section of the Huaihe River Basin is constructed.The ecological vulnerabili-ty index of Anhui section is measured by the weight of CRITIC and comprehensive index method,and the Sen+MannKendall test,standard deviation oval and G(1,1)-Markov model are adopted.This paper analyzed the temporal trend and spatial characteristics of ecological vulnerability in An-hui section from 2012 to 2022,and predicted the ecological vulnerability index of Anhui section in Huaihe River Basin from 2023 to 2027.The results showed that the ecological vulnerability index of Anhui section of the Huaihe River Basin showed a downward trend during 2012-2022,and the abrupt point of the ecological vulnerability index was in 2016-2017.The ecological vulnerability index of the Anhui section of the Huaihe River Basin showed a pattern of high in the middle and low in the four sides,and the spatial clustering trend of ecological vulnerability center in each re-gion was enhanced,and the contraction trend in the migration range of the center of ecological vul-nerability was stronger in the north-south direction than in the east-west direction.The ecological vulnerability level of Anhui section in 2023-2027 is in the second grade,and has a strong trend of development towards the first grade.
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