Abstract: According to the 2001-2010 commercial income composition of the rural families in China, analysis is made to investigate the principal factors that influence the rural commercial income by use of the grey correlation theory, which reveals that: the top 5 factors are the agricultural income, transportation income, animal husbandry income, building industry income and operating income of wholesale business. It is found that the increase of commercial income of rural family must be achieved via agricultural restructuring and the construction of a highly efficient agriculture system and a powerful protective system for farmers’ income as well.