Financial risk control mainly refers to the financial management process, the use of relevant information and specific means of corporate financial activities to influence or adjust in order to achieve the financial objectives set by the plan, to maximize risk aversion. In the Internet M & A activities, enterprises should pay attention to control financial risks, including prevention and control valuations, choose the right way of payment and financing. In addition, we should learn from the mode of operation of domestic and foreign enterprises, the right to judge the M & A needs, not blind M & A activities.