In the Internet era, data is occupying an increasingly important position, and some important data may even affect the country. More and more people demand that big data correlating with national security and social stability be treated as public goods which hold the characteristics of non-excludable and nonrivalrous. However, due to the economic attribute of big data, we proposes that this type of big data is excludable and non-rivalrous, and should be treated as quasi-public goods. To support this point of view, we quoted two examples, DiDi Chuxing and Cambridge analytics, and give solutions respectively. We believes that the government, as a public service provider, should supervises the use of big data rather than the content of big data. It not only protects the private rights of enterprises to data, but also avoids big data leaks that threaten national security.