Mergers and reorganizations of enterprise are an important way to achieve the efficient allocation of resources. How to effectively run after the merger and reorganization, it needs to establish a coordinated and orderly financial management mechanisms and modes. The paper is set in the mergers and reorganizations of the large-scale coal enterprises in China. It is to conduct the all-around analysis tin financial management and accounting, to select the financial management mode and solve the real problems in the operations, and to provide support for the efficient, and long-term operation of the enterprise.