Public welfare posts are supported by government funding, and social forces raise funds. They are mainly for resettlement of older groups with employment difficulties, and are management and service posts in line with social public interests. The "Beijing Civilized Vehicle Supervisor" mainly consists of "4050" personnel. Group, they experienced the deconstruction of self-identity in the laid-off, creating a crisis of self-identity and anxiety. However, in the public welfare position of civilized ride supervisor, they gradually got rid of the crisis of self-identity and played a new role In the role play, new group belonging and new self-worth have been obtained. In the pursuit of self-meaning, the self has been reconstructed, and self-identity and social identity have been obtained. The main emphasis of this passage? ['Definition of non-profit positions.', 'Self-reinvention of Beijing civilization ride supervisor.', 'Main psychological characteristics of practitioners in public welfare posts.', 'Public welfare positions help practitioners to self-identify and reshape.']