[Objective] Aimed at the controversial views on the influence of grain for green project on the rural economy, according to statistical yearbooks and field research data from 1997 to 2010, the author analyzed the influence of grain for green project on the rural economy of Laishui County, Hebei Province.[Methods] Utilizing the grey relational analysis method.[Results] The land use structure had changed and the industrial, and the agricultural structure were improved and the farmer's annual income was increased due to the implementation of grain for green project. The correlation degree of the third industry, forestry and rural economy was higher, and the score were 0.75 and 0.66 individually, but farming, fishing, animal husbandry included in the first industry had less impact on the increase of farmers' income.[Conclusion] Rural industrial structure and the internal structure of agriculture still need upgrading and the structure of rural labor force should be optimized so as to promote the sustainable development in the impoverished region.