Based on Chinese A-share listed companies from 2007 to 2021, this paper empirically tests the impact of core competence information disclosure on analyst following. We find that there is a significant positive correlation between the disclosure of core competence information and the analyst following. Mechanism test shows that the disclosure of core competence information improves the attention of analysts by reducing information acquisition costs. Further research shows that technology and brand core competence information can attract more attention from analysts. The positive impact of core competence information disclosure on analyst following is more significant in higher corporate governance level samples. Besides, core competence information disclosure can also reduce the deviation and divergence of analysts’ earnings forecast. The research conclusions of this paper are helpful to enrich the literature on the economic consequences of the disclosure of core competence information and the influencing factors of analysts’ following, and have a certain reference for the regulatory authorities to further improve the requirements of relevant information disclosure.