Tomb murals are among the most important painted cultural relics, and removal, reinforcement and restoration are main protection methods for them at present. During the removal, the digital recording and characteristic analysis of mural painting contents and pigments is an important basis for the subsequent reasonable restoration of the mural surface. The spectral imaging technology, as a means of information detection for synchronous perception of attributes and vision, can be used for the high-dimensional information recording and material attribute analysis of the pigment layer on mural surfaces. In addition, virtual restoration of pigment colors can be realized using the hyperspectral pseudo-color display technology. Based on this, a method for virtual restoration of the colors of mural pigments based on the spectral fusion analysis and band-pass energy integration is proposed and experiments on mural pigment recognition and virtual restoration of colors were carried out using collected pigment spectral data, mural hyperspectral imaging data and mixed pigment spectral data in simulated real scenes. According to the experimental results, for the red, yellow, blue and green pigments on the selected mural from Tang tombs, the spectral fusion recognition demonstrated that the red pigment from the tomb of Imperial Concubine Wu Hui was cinnabar/silver vermilion, the yellow one from the tomb of Han Xiu was orpiment/bezoar, the blue one from the tomb of Imperial Concubine Wu Hui was azurite/lazurite, and the green one from the tomb of Han Xiu was malachite. In addition, based on the above results, virtual restoration of mural pigment colors of pure color restoration and mural substrate rendering restoration were obtained. These results could provide a reference of the visual restoration of pigment layers for the physical restoration of murals. The above research results have important innovative and exemplary significance in the field of mural heritage protection and activation utilization.