During the Qianlong-Jiaqing reigns，Han Learning was flourishing，and textual research in Confucian classics and history became popular among scholars．However，the academic differences between the Qianlong and Jiaqing reigns are worthy of our attention． After the early years of the Jiaqing reign，There was a revival of Song Learning and Confucian statecraft tradition，and Han-Song syncretism became the academic mainstream．These Changes were closely related to the civil administration in the QianlongJiaqing reigns． By exploring the causation and influence of the changes，this article aims to further elaborate the academic evolution in the mid-Qing．