Discussing the voluntary and mutual aid practices of the residents during the pandemic period has important practical significance for seeking the transformation path of urban governance in the era of uncertainty. The analysis results showed that the community mutual aid atmosphere in Shanghai was strong during the epidemic period, and the importance of vicinity was highlighted; Residents actively participated in voluntary services, which strengthened the community connections; Residents′ sense of com munity has been continuously improved, which has strengthened the community solidarity. Further examination of the relationships between the community mutual aid, community volunteering, and community sense found that community mutual aid behaviors and the positive feelings they generated significantly enhanced the sense of community; When residents felt the warmth of the neighborhood, the joy of helping others, the unity of the community, and when they had a deeper understanding of the streets, communities, neighborhood committees, grassroots party organizations and other subjects, they would have a positive influence on the sense of the community. Different types of voluntary services had different influence on the sense of community. Faced with the uncertainty of the epidemic situation, the residents resorted to the vicinity, and formed a network of grassroots actors with everyone′s participation and everyone′s responsibility to fight the epidemic situation. This was an enacted community, which demonstrated situational solidarity.