Encouraging migrant workers to start their own businesses is an important measure to increase farmers’ 1income and realize common prosperity in both urban and rural areas. Based on the 207 China Migrants Dynamic Survey (CMDS) and the calculated digital economy index, this paper empirically tests the impact of social interaction involution on migrant workers starting businesses in cities and the regulatory effect of digital economy. It is found that social interaction involution significantly inhibits migrant workers starting their own business in cities, and has a greater inhibitory effect on opportunistic business; Digital economy has a negative impact on the survival business of migrant workers, while it has a positive impact on the opportunistic business; Digital economy helps to alleviate the adverse impact of social interaction involution on opportunity business of migrant workers in cities.