Mural is the early form of Chinese painting, and its rich image information has important historical value for the study of connotation. During the Song Dynasty, the production of Shanxi murals reached its peak, especially with a large number of Buddhist themes in temple murals. These mural images have typical functional and narrative characteristics. This paper deeply analyzes the composition and content of the temple mural image of Gaoping Kaihua Temple, and uses the narrative law to analyze the secularization tendency retained on the image style, trying to restore its influence in local life. Exploring the Causes of the Necessity of Mural Secularization from the Buddhist cultural heritage,the spiritual needs of the people,the political needs of the Imperial Court and demand for painters and monks.