During the reign of Qianlong and Jiaqing, calligraphy was faced with the increasing popularity of the new aesthetic trend of Stele Study, coupled with the wide use of new tools and materials such as raw paper and wool brush. A new technique system, especially the ink method, had yet to be established. Deng Shiru, who has gained the momentum of this era, diligently made full use of the characteristics of raw paper and wool brush, and formed a distinctive style of ink painting, which is elegant, ancient and thick, and has the spirit of epigraphy. By analyzing the internal aesthetic mechanism of the formation of Deng Shiru's ink style, starting from the theoretical analysis of the relationship between his ink style and spirit of epigraphy, brushwork and space, and combining with the image analysis examples of his works, this paper makes an in-depth interpretation of the performance skills and aesthetic connotation of his ink style, in order to help readers understand Deng Shiru's influence in the history of calligraphy and gain some insights.