The "butter oil lamp" is refined from pure plant edible oil, with a stable and lasting flame and a faint natural cream fragrance when burning. It is often used in temples in Tibet, or a chanting ceremony is held at home, or a sacrifice activity is held for the dead, and several or hundreds of butter lamps are needed. According to the scripture, burning butter lamps can turn the world into a torch, so that the fire will never be blocked, the naked eye will become extremely bright, understand the law of knowing good and evil, eliminate the darkness of blindness and ignorance, gain the heart of wisdom, make the world never confused in the dark, turn it into a lofty world, and get rid of compassion quickly and thoroughly. Butter lamp plays an important role in the hearts of Tibetan Buddhist believers, and it is not an exaggeration to compare butter lamp to the spiritual lamp of believers. At the end of life, if there is no butter lamp, the soul will be confused in the dark.