Under the background that the new Archives Law clarifies the legal effect of electronic archives, the issue of social trust will become one of the important factors that restrict the efficiency of the use of electronic archives. Based on the case study method, this paper takes three cases of electronic archives of non-governmental institutions not being trusted as the research object, uses the trust culture interpretation model of Piotr Sztompka for reference to build a research framework, and analyzes the reasons for the social trust dilemma of non-governmental institutions' electronic archives from the four dimensions of "qualification" "technical transparency" "familiarity" and "value orientation", and put forward targeted countermeasures and suggestions, including building the qualification awarding system for electronic archives management, building a technical platform for electronic archives authenticity verification, expanding the breadth and depth of the opening of electronic archives, and striving for government credit guarantee. Because of the commonness of electronic archives management, this paper also has reference value for the research on the social trust in electronic archives of government agencies.