Elderly immigrant refers to the old people who take care of the younger generation or are supported by their children，living with their children who settled in Beijing for more than two months. Taking community C of Beijing as an example，we analyze the present situation and the needs of the social integration of the elderly immigrant，then use case work，group work and community work to enhance the understanding of the migrant city in terms of language，customs，relationships and geographical environment，and provide opportunities for exchanges between the elderly immigrant and local residents，and enhance the sense of belonging to the community，so as to achieve social integration objectives.