1. The domestic market of phreatic materials is divided into new construction and expansion project market, old installation and maintenance and transformation project market. From the perspective of these two markets, the common SBR products are severely punished for being more than the demand. Secondly, there is competition among the diving materials factories, which leads to disordered competition and fake products The market is very nonstandard, causing some SBR consumer enterprises to lose a lot in the fierce competition. From the demand of these two markets, with the development and improvement of market economy, especially the progressive World Trade Organization (WTO), the market changes more and more, the diving material factory is affected by the market more and more deeply, the user's demand for market products is higher and higher, and the demand for product development and consumption cycle is shorter and shorter. 2. Overseas market of diving materials. In recent years, the foreign market is very lively and the competition is quite fierce. The rapid growth of SBR import and export in East Asia and Southeast Asia, the continuous development of market trade between prosperous countries such as the European Community in North America, the export expansion of Germany, Italy, Japan, China and other countries and regions, and the rapid growth of imports from the United States, Britain, France and other countries constitute the support points for the prosperity of the international SBR Market. Moreover, due to the further internationalization of the world economy, multinational companies The development of international SBR market will be promoted from time to time, and regionalization of international trade will become another major feature.