Nowadays, for restoration of Chinese paintings and calligraphy, there are more and more excellent ways to retain and restore original mountings with ancient styles, along with the broken painting or calligraphy itself. In our work, we restored a couplet by Wu Changshuo from Yixing Museum, and also preserved its original mounting. The calligraphy and the original mounting both had serious creases, breakage marks, or even cracks. The cover and the backing paper were aged and crispy. After analyzing the materials, diseases and characteristics of the calligraphy and the original mounting, with the aim of achieving the optimum effect of restoration, the calligraphy and the mounting were separated and then restored separately before being recombined. At the time of recombination, improvements and fine adjustments of the original mounting defects were also made so as to restore the original appearance, retain the elegant charm of the times and be conducive to future collection and conservation.