The Palace Museum currently has many stone heritage. These stone artifacts are placed in the natural environment and have been eroded by the environment for a long time, which can form hard black crust pollutants to remove difficultly on the surface of these stones. It could affect the beauty of stone artifacts and the details of carving seriously.This paper selects two stone components that removed from different areas of the Palace Museum as the research objects.By utilizing these method including scanning electron microscopy, Raman spectroscopy, and X-ray fluorescence technique, the composition of black crust pollutants could be obtained. To avoid the yellowing effect, a dual wavelength laser cleaning technology is used for black crust pollutants by combining infrared with ultraviolet. The energy of the two laser beams should be changed, but the ratio of the energy is constant. The experimental results show that the energy of the infrared and ultraviolet is 16. 8mJ and 1. 2mJ, respectively. The black crust pollutants have good cleaning effect. Comparing the cleaned and uncleaned parts of the stone components, it proves the advantages of laser cleaning technology in removing black crust pollutants from the surface of stone cultural relics. The cleaning effect is evaluated by microscopic methods.