The invention discloses an excavating method for a group research direction based on binary network diagram hierarchical clustering. The method comprises the following steps: 1) establishing an author research interest representation model based on an author keyword binary network; 2) performing diagram clustering on the author research interest representation model: classifying the authors with small difference in concern extent of all keywords into a same author group, thereby acquiring an author group set; 3) performing overall hierarchical clustering, thereby acquiring the research interest of each author group set: merging the author group set which only contains one author into other author group sets with similar research interests, causing each author group set to contain more than two authors, and calculating and updating the research interest of each author group set, namely, the group research direction. According to the method provided by the invention, the academic research direction of the group can be effectively excavated and beneficial conditions are supplied for the development condition of the analysis and evaluation for the group research direction.