Since the 20th century, with the acceleration of the process of global economic integration, a new round of M & a trend has emerged in developed countries in Europe and America. In the same way, M & A in mainland China is also booming. This paper will start with geeya Technology Co., Ltd. to explore the causes of financial risks in M & A between enterprises and put forward relevant countermeasures. Through comparative research, literature reference induction and experience summary in the two M & A cases of geeya Technology Co., Ltd., it can be concluded that if the enterprise can pay attention to the information collection in advance, and choose a reasonable multi-channel financing mode, it is necessary to arrange a thorough financial review. The financial risks in M & A can be greatly offset to ensure the success of M & A and the operation of new companies.