Yu Han Fang Shan Yi Shu is divided into three parts: Jing, Shi and Zi, with more than 700 volumes and 594 lost books. Attached is thirty-one volumes of Mu Geng Tie by Ma Guohan. Every book is compiled in the order of parents. This paper introduces the lost situation and compilation source of this book. This book provides some convenience for academic research and is highly praised. In the late Qing Dynasty, Li Ciming mentioned in his diary that the book is "based on the interpretation of ancient classics and Zhang's Tang series, but it is profound and profound, with far-reaching details compared with Wang's suicide note". However, it is inevitable that one person will be careless in compiling such a huge system. As far as the compilation of ancient books is concerned, Han Yu Shan Fang Yi Shu Ji is still a well-documented masterpiece.