Writing and shooting public welfare videos seems to be unable to make direct profits in the early stage, but in the long run, more social benefits can be obtained. The positive energy introduced by the production of advertising films attracts people to be kind, upholds justice, weakens commercial interests, and achieves the purpose of erecting a good social image of enterprises. College students' public service propaganda films should understand the role of public service advertising propaganda films. The production of advertising films can have direct benefits, and can also rely on social benefits to bring long-term development.