This study aims to explore the impact of corporate disclosure policy on analyst earnings forecasts. To address this issue, the information transparency index and voluntary disclosure indicator published by the Security and Futures Institute (SFI) are used to measure information transparency and voluntary disclosure of a firm, and earnings forecast accuracy is employed to proxy for analysts' earnings forecast quality. The results show that information transparency is positively associated with earnings forecast accuracy, indicating that transparency helps analysts improve their financial forecast accuracy. However, no relationship is found between the level of voluntary disclosure and analysts' earnings forecast accuracy, indicating that corporate voluntary disclosures alone make no incremental contribution to the quality of analyst earnings forecasts.