Few researches have been done on the health status of a reinforced slope， as well as on the service life and protection of reinforced structures in a slope at present. In view of gray and fuzzy index of durability evaluation influencing factors on anchors in an existing reinforced slope， this article sets up a health status diagnosis method and evaluation criteria of index system on anchors in an existing reinforced slope based on the theories of gray correlation and fuzzy recognition. We put forward a method of evaluation index fusion empowerment value based on information entropy and compound weight according to variation degree of durability evaluation indexes on anchors in an existing reinforced slope. Research shows that the diagnosing method of the health status of anchors in an existing reinforced slope proposed in this paper can reflect health status fully and systematically. Judgment results are reliable and reasonable as well， which provides new ideas and methods for the health status diagnosis of existing reinforced slopes and the design， construction and maintenance of anchors. It has an important significance and reference value in civil engineering fields.