The optimization of industrial structure and the integration of the three industries in rural areas are interrelated and interactive,and they are inseparable. The optimization of industrial structure promotes the integration development of rural three industries which helps to promote the optimization of industrial structure. Based on this,taking Jilin Province as the research scale, this paper analyzes the theoretical basis,function,feasibility and path selection of the industrial structure optimization and rural three industries integration development of Jilin Province,aiming to better promote the industrial structure optimization and rural three industries integration development of Jilin Province,and improve the quality and level of social and economic development of Jilin Province. The research shows that the optimization of industrial structure and the integration development of rural three industries in Jilin Province should adhere to the effective path of actively cultivating new agricultural operation subjects,giving full play to the positive role of government,market and social organizations in the integration development of rural three industries,and promoting the construction of industrial parks.