Abstract: [Abstract]　Starting from the process of user’s access to open access journal media， this paper uses the Analytic Hierarchy Process（AHP） to construct the index system of the influencing factors of knowledge dissemination effect from three dimensions of media contact， media use and media evaluation. Then， it uses an AHP software yaahp to determine the index weights. The results show that the influence on the knowledge dissemination effect of open access journals are mainly reflected in the media use and media evaluation， and especially in the website performance index， resource open degree of resources index.