In order to establish a reasonable maintenance and strengthening scheme for CFST arch bridge,a comprehensive method for evaluating the damage conditions of the bridge is studied with consideration of its construction features.A multi-level evaluation model for the damaged CFST arch bridge is established,and evaluation indices in the rating standards are defined primarily in the model.A normal relational function is constructed to calculate the relational degree about the evaluation indices of each element,which has no sublevel elements to each rating grade.When evaluating the elements in sublevel or index level of the model,the weights of elements pertaining to one element are adopted by taking account of their deterioration degree.The damage conditions of bridge are characterized by relational degree and element evaluation scale,which is uniform with the Code for Maintenance of Highway Bridges and Culvers.The evaluation index system and a set of evaluation methods about the superstructure of CFST arch bridge are brought forward.The methods can evaluate the working condition of CFST arch bridge and offer a scientific basis for bridge maintenance and decision making.