Zhang Jizhi's calligraphy was deeply influenced by the Tang Dynasty. He first studied Ouyang Xun, Chu Suiliang and Yan Zhenqing, and later turned to Mi Fu. He studied Han Li and Jin and Tang classics, and was influenced by Zen philosophy. Forming a unique calligraphy art style. He is also able to "uniquely pass on family learning", with Zhang Xiaoxiang's calligraphy as the main theme, and form a system of his own. This system was formed on the basis of inheriting the traditional techniques of the ancients, absorbing many nutrients and then boldly innovating. Zhang Jizhi is good at regular script and calligraphy, and he especially likes to write big characters. He was erudite and knowledgeable. He was "pure in nature, liked to read books, and had rare copies of classics and history." Zhang Jizhi was an important figure in the calligraphy circle of the Southern Song Dynasty. He was one of the six people in the Song Dynasty who wrote "History of the Development of Chinese Calligraphy", including Zhang Jizhi and the other five. They are the four families of the Northern Song Dynasty and Zhao Ji. Zhang Jizhi was an innovator who turned the tide in the late Southern Song Dynasty, revitalized the art of calligraphy, and devoted his whole life to changing the declining style of calligraphy. He dominated for a while, and was known as the "king of calligraphy in the Song Dynasty." The original biography of "History of the Song Dynasty" said that he "was able to "Books are known all over the world", "The large characters are quaint and powerful, and the fine calligraphy is especially handsome and extraordinary." His writing is simple and concise, his brushwork is solid and vigorous, his stippling is eye-catching, and his knots are handsome and powerful, making the structure of the characters vivid, lively and refreshing. His book "Du Fu's Poems in Large Characters" was praised by predecessors as "having the image of a long wind and breaking waves". Although the Jurchen people were far in the north and were in a hostile position with the Southern Song Dynasty, they did not hesitate to use Zhang Jizhi's calligraphy works. He spent a lot of money to purchase the works handed down from ancient times: "Buddha's Relics Sutra", "Vajra Prajna Paramita Sutra", "Tai Shang Cave Xuan Ling Bao Immeasurable Human Sutra", running script "Double Pine Picture Song", "Tai Lu Yuan Ji" ", "Shu Du Shi", "Wang Shi Bao Ben An Ji", etc.