Outdoor wall painting draws various patterns on the outdoor wall in the form of artistic painting. Outdoor mural is an accessory part of outdoor wall or building. The decorative and beautifying effect of wall painting makes the whole environment more artistic. Outdoor mural painting is one of the earliest painting methods in human history. Its predecessor is street graffiti art in Europe and America, and the previous graffiti art has always been understood by us as graffiti on street walls. Modern wall painting gradually develops towards standardization and health through the processing of hand-drawn designers and the constraints of wall users. Modern wall painting appears in the form of advocating civilization, advocating public welfare and protecting the environment. The appearance of each mural pattern will help the city to enhance its brand image and improve people's living standards.