This paper sorts out in detail the various public welfare activities held by the welfare lottery institutions in 23 provinces in 2021，analyzes the number and type of public welfare activities，activity content，funding sources and brand building，and compares the similarities and differences of public welfare activities in the eastern，central and western regions. In 2021，due to the epidemic and other reasons，the types and numbers of public welfare activities of provincial welfare lottery institutions have decreased compared with the previous year. This article analyzes the public welfare activities of Hebei Province “Fucai Presents True Feelings，Love and Helps Students”，Hunan “Fuze Xiaoxiang” series of public welfare activities and Shenzhen Municipal Public Welfare Activities for Shenzhen Builders；It is proposed that the lottery system needs to pay more attention to the value of public welfare activities，strengthen the construction of public welfare brands，improve the effectiveness of public welfare marketing，and attach importance to three aspects of information dissemination.