The relationship between oil industry and local economy is a hot issue in academic circles, but the research on the interests of ethnic minorities in ethnic areas is ignored. Based on the perspective of solidifying the sense of Chinese national community, according to the theory that the economic basis of Marxist historical materialism determines the superstructure, this paper uses the method of Marxist contradiction analysis to study the mutual support between the oil industry and the local economy in ethnic areas with the thinking framework of dialectical logic, and discusses how to take the common development of the two as the economic basis to improve the sense of acquisition of the minority people, Strengthen the identity of the Chinese nation's pluralistic integration. Based on the conflict of interests between Central Petroleum Enterprises and national regions, this paper analyzes the imbalance of tax income distribution in petroleum industry, the lack of matching between petroleum industry and local economy, and the insufficient driving of petroleum industry to national economy. It concludes the fundamental reasons for the horizontal division of petroleum industry under centralization, including the central monopoly of the tax revenue right of petroleum industry and petroleum industry Based on the specific reasons such as vertical management, horizontal division of labor, diversified and integrated pattern of national economy, this paper puts forward the policy measures of economic integration under the support of preferential policies, including the priority of oil revenue in national autonomous areas, the extension of oil industry chain by oil and land integration, the green and sustainable development of oil agriculture, and the joint efforts of oil and land to improve the quality and skills of minority workers.