Outdoor public welfare slogan is a kind of slogan that is not driven by economic interests, but for a specific purpose and conforms to public interests. Community outdoor public welfare slogan is the extension and development of outdoor public welfare slogan in the community, and it is a slogan released on some specific public welfare themes in community public areas. The particularity of the publishing space of community slogans makes its content and objects more targeted than ordinary outdoor public welfare slogans, so it is necessary to discuss and analyze the characteristics and existing problems of community public welfare slogans. I. Overview of outdoor public service slogans in Cao Yang community Cao Yang plot is an area of nearly 4 square kilometers surrounded by Zhongshan North Road, Cao Yang Road, Wuning Road, Jinshajiang Road and Daduhe Road. It includes the communities built in various periods in Shanghai, including the earliest batch of new workers' villages in Shanghai. After decades of construction and changes, it is more representative to take the public service slogans in the communities here as samples. There are *** 19 communities in Cao Yang block. From the time of formation, there are old-fashioned communities such as Cao Yang No.2 Village and Cao Yang No.7 Village in 1950s and 1960s, No.5 Village and Gui Xiang New Village in 1970s and 1980s, and new communities such as Tongbai Apartment formed after 1990s. Community residents are mainly citizens of this city, with a high level of education, and the community has also formed a relatively mature community culture.