By taking regional financial ecological environment assessment as the research object, this paper proposes a new fusion method, based on hesitant fuzzy linguistic term sets, by combining grey correlation analysis theory, puts forward the concept of hesitant fuzzy linguistic grey relevancy, based on the principle of deviation maximization, constructs the maximizing model to receive objective weights of attributions, and finally uses a numerical example to verify the effectiveness and feasibility of the model. The advantage of this model is to break through the traditional grey correlation analysis applied to decision-making of interval attributions and is more vague and closer to realistic linguistic assessment environment. The method can not only make full use of original assessment data but also reduce unnecessary loss of information.