In 2008, the risk of natural disasters and economic recession in the United States increased, which increased the uncertainty of China's economic trend from both internal and external aspects. There are voices in the society to relax regulation and avoid a sharp decline in economic growth, and there are even concerns about "hard landing" and "stagflation". Therefore, it is particularly important to correctly understand and grasp the impact of freezing rain and snow disasters and changes in international situation on China's economy. From all aspects, the impact of freezing rain and snow disasters is short-term and partial, and will not affect the fundamentals of China's economy. Although the economic slowdown in the United States and the world has a greater impact on China's economy than in the past, its impact cannot be overestimated. Under the current situation, we should continue to adhere to the basic policy orientation of "double prevention", adhere to a prudent fiscal policy and a tight monetary policy, actively respond to the possible impact of freezing rain and snow disasters and changes in the international situation, scientifically grasp the rhythm and intensity of macro-control, enhance the flexibility and flexibility of policies, and maintain steady and rapid economic growth throughout the year. I. Analysis of the Impact of the American and Global Economic Slowdowns Since last year, with the gradual emergence of the American subprime mortgage crisis and its spread to the global market, it has not only directly affected the American economy, but also triggered turmoil in international financial and capital markets, casting a shadow over global economic growth. The economic slowdown in the United States and the world has a greater impact on China's economy than before. In the past five years, China's economy has experienced a period of sustained prosperity. This is inseparable from China's accession to the WTO to expand the space for external demand. The global allocation of production factors and the export of "Made in China" products to the world have brought China's economy closer to the global economy. The frequent exchange of RMB and foreign currency makes it impossible for China to stay out of the global economy, and the impact of the economic slowdown in the United States and the world on China cannot be ignored. With the strengthening of China's ties with emerging economies and the diversification of export markets in recent years, targeted measures can be taken to mitigate the impact of the economic slowdown in the United States and the world. More importantly, China's economic growth is mainly driven by domestic demand. The impact of changes in external demand on China's economy also depends on whether domestic demand can be effectively expanded and the relationship between internal and external demand can be balanced. Fourth, the economic slowdown in the United States and the world has increased the downward pressure on China's economy, but it will also become the driving force for the adjustment of export structure and the transformation of foreign trade development mode. The slowdown in the US economy and the global economy may slow down China's economic growth. It is predicted that the economic growth of China this year is expected to be around 10.5%. If the US economy declines, it may affect the economic growth rate of China by 0.5 ~ 1 percentage point. Considering the impact of the global economic slowdown, external input factors may lead to a certain degree of decline in China's economic growth, which will help China's relatively rapid economic cooling. At the same time, the deceleration pressure of external input may also prompt China to accelerate the adjustment of export structure and change the mode of foreign trade development. The shrinking space of external demand and the intensification of international market competition will prompt China to expand the export proportion of high value-added products, strengthen the cultivation of independent brands and enhance the competitiveness of export products. At the same time, the subprime mortgage crisis led to a general decline in global asset prices, including resources, which provided more opportunities for China's overseas investment. China can intensify overseas investment and mergers and acquisitions, accelerate the implementation of the "going out" strategy, open up new space for external demand, and enhance its ability to cope with fluctuations in the international market.