The quality of book editor has always been a key concern of the traditional publishing industry, and has gradually become an applied research field of long-term practical exploration in the industry. Changjiang Publishing Media, a state-owned publishing enterprise, is taken as an example.Data is collected through literature research, interviews and questionnaires, and Nvivo12 and Spss26 software to collate and analyze the original data.The book editor competency is gradually adjusted, the competency model is constructed and verified. The competency model of book editor is composed of 31 competency characteristics in 4 dimensions: professional skills, core competence, professionalism, and personal traits.