The key to common prosperity for all lies in the common prosperity of farmers, and digital rural construction is an important channel to achieve common prosperity for farmers. Based on panel data from 30 provinces in China from 2012 to 2022, we innovatively incorporate digital rural construction, migrant workers returning to their hometowns for entrepreneurship, and farmers" common prosperity into the same development framework to empirically test the relationship between the three. The research results show that the construction of digital rural areas helps to promote the return of migrant workers to their hometowns for entrepreneurship and the common prosperity of farmers; The construction of digital rural areas can positively affect the common prosperity of farmers through the return of migrant workers to their hometowns for entrepreneurship, and this conclusion has a certain degree of robustness; The promoting effect of digital rural construction lies in the heterogeneity of information technology level and agricultural labor productivity, which is manifested in a stronger promoting effect on the common prosperity of farmers in areas with low information technology level and low agricultural labor productivity. Based on the research findings, this article proposes key directions for promoting common prosperity among farmers by comprehensively accelerating the construction of digital rural areas, taking multiple measures to promote the return of migrant workers to their hometowns for entrepreneurship and employment, and promoting regional coordinated development according to local conditions.