Thangka is a unique painting art form in Tibetan culture. With distinctive national characteristics, strong religious color and unique artistic style, it depicts the sacred Buddha's world with bright colors. Pigments traditionally are all gold, silver, pearl, agate, coral, turquoise, malachite, cinnabar and other precious mineral gems and saffron, rhubarb, indigo and other plants as pigments to show their holiness. These natural raw materials ensure that the painted thangka color is bright and dazzling, although after hundreds of years, it is still bright and bright. Therefore, it is known as the treasure of Chinese national painting art, known as the "encyclopedia" of the Tibetan people, and is also a precious intangible cultural heritage in the folk art of the Chinese nation