Abstract: 【Purpose/significance】Identify the key influencing factors of elderly-oriented ecology of digital entertained information, enrich the research related to digital information ecology for the aged, and provide theoretical guidance for the transformation of digital entertained information ecology for the aged【. Method/process】Using the Delphi method and through three rounds of expert surveys, a set of factors influencing the elderly-oriented ecology of digital entertained information is extracted. Fuzzy—DEMATEL method is used , combining with the nine-quadrant distribution diagram, to identify the key factors and analyze the mechanisms of their effects. 【Result/conclusion】The study obtains 25 elderly-oriented digital entertained information ecology influencing factors, of which 14 fac⁃ tors, such as the level of information quality, the richness of information content and quantity, and the diversity of information forms, are the key influencing factors, which can be further divided into 3 levels, namely dependency factors, linkage factors and driven fac⁃ tors.【Innovation/limitation】This study takes the platform as an entry point to explore the key influencing factors of elderly-oriented ecology of digital entertained information and its influencing mechanisms，but the expert surveys are relatively subjective.