According to the latest development of the Sino - US trade war, the US government's tariff increase covers almost all fastener products. This is a great pressure on Chinese fastener companies facing losing a fifth of the world's market share. On the one hand, there is still a big gap between China's manufacturing technology and that of developed countries. China's fastener industry has implemented structural adjustment, transformation and upgrading and speed-up and efficiency increase driven by innovation in recent years. If its share of exports to the United States is reduced, it will certainly affect the industry development speed of the whole industry. On the other hand, for Chinese fastener companies, the U.S. market is the largest single country market in the world. Affected by the trade war, Chinese companies have to find new export growth points again, which will be a very huge challenge for small and medium-sized enterprises at the bottom of the industrial chain.