The energy industry of China has developed progressively in monopoly and competition. With the capital market continuous deepening，energy enterprises fuse capital in the industry，carry out and deepen system reform by drawing support from capital market，and realize the industrial integration & expansion in the guidelines of national policies. By implementing the strategy of big enterprises groups and M & A，coal and electric enterprises carry out structure adjustment，and expand the industrial chain to up and backward positions according to their characteristics. Petrol-china returns A Share Market of China to promote the integration of domestic oil resources. New energy has gradually achieved the goal of scale economy with many financing methods；further opening to private-owned enterprises will bring a new vitality into the energy industry.