Gelatin with alum was widely used in the mounting and conservation of Chinese calligraphy and paintings, but it is also one of the important materials resulting in paper acidification. To investigate the applicability of modified collagen to pigment fixing for Chinese calligraphy and paintings, we studied the effect of a fixing solution made from fish glue, chitosan and konjac glucomannan on the properties of Xuan paper and three pigments. The results showed that after the treatment with the fixing solution:1) a gel coating was formed on the paper fiber surface, obviously improving the mechanical properties of Xuan paper and 2) aging of pigments was slowed to some extent compared with those treated with gelatin and alum.