Unbleached bamboo paper is the most common type of paper in ancient books. According to the pulping and papermaking process, it can be divided into two types： uncooked process and cooking process. The basic physicochemical, optical, mechanical properties, and fiber microscopic morphology of 3 kinds of uncooked and cooked bamboo papers produced by 3 paper workshops from Fujian province were tested. The physicochemical properties of bamboo papers prepared from uncooked and cooking processes were investigated, especially their differences in durability. The results show that the cooked paper has obvious advantages in D65 brightness, post color number, pH value, Kappa number, and other durability related physicochemical indexes, rendering it the more suitable restoration material for ancient books. The dimensional stability of uncooked paper is better but the durability is not as good as that of cooked paper. The results provide references for in-depth understanding of the physicochemical properties of the materials of ancient books, formulating targeted preservation and protection countermeasures, and selecting appropriate restoration paper for ancient books.