Description:
<jats:p>As an important part of the science and technology evaluation system, evaluations theory and method of journal influence need targeted research and improvement. Based on the analysis of traditional journal evaluation methods, this paper put forward an evaluation index of the core journals in the field-R<jats:sub>f</jats:sub> index, and constructed the influence evaluation model of academic journals in subdivided fields. Finally, through empirical research, it is proved that R<jats:sub>f</jats:sub> index can accurately find high-quality journals in subdivided fields, which is beneficial to enrich and improve the journal evaluation system.</jats:p>