Wall advertising is to use the walls on both sides of expressway to draw various publicity contents with colored waterproof paint pigments, or to make advertising patterns with spray-painted cloth or spray-painted film. The former is called wall painting, and the latter is called wall painting, which is similar to advertising towers and road signs. Compared with other forms of advertising, it has the advantages of low cost, wide distribution, lasting timeliness, fast production and good visual effect, which is conducive to enterprises to explore the low-end market, so it is favored by the majority of enterprises. It is the most suitable advertising form to expand the rural market.