Background--In Sino-US trade frictions, China imposed tariffs on some timber imports from the United States, which inhibited the import of American timber. With the abolition of tariffs, it will inevitably have an impact on the imports of China's sawn timber and log. ⑵ Methods--Based on the monthly data of sawn timber and log imports in China from January 2010 to February 2021. In this paper, the dynamic Rotterdam model is used to calculate the compensation price elasticity and non-compensation price elasticity of China's import demand for sawn timber and log from different countries. (3) Results--①In terms of the compensation cross-price elasticity of various wood products from different sources, the cross-price effects of wood products from different countries in the short / long term are all complementary. ②China's timber import elasticity of expenditure is remarkable, and sawn timber import market concentration will decline in the long term. In the future, China will increase imports of log from New Zealand, Russia and the United States, and the import market will be more concentrated. ③China's demand elasticity for American log imports is flexible, and China will greatly increase its imports of American log. In the long run, China will increase the import dependence on American log and sawn timber, especially on American log. ④ With the exception of Thailand sawn timber, China's self-price elasticity of imports of sawn timber and log from other countries is positive and inelastic, indicating a modest increase in China's import demand for these timber products as prices rise. ⑤The core competition of future timber market is not price competition, but market share. The core competition factors are stable supply-demand relationship and stable trade policy. ⑷ Conclusions and Discussions--With the increasingly prominent contradiction between supply and demand of sawn timber and log in China, timber import demand will continue to grow. In the long run, China will reduce imports of Russian sawn timber, and sawn timber import market concentration will decline. In terms of China's sawn timber and log import market, as China's demand for imported timber continues to increase, imported sawn timber and log products will appear Giffen effect. The core competitiveness of China's imported timber market is not price competition. The stable timber supply and stable timber trade policies of exporting countries have a greater impact on China's timber imports. In addition, China imposes tariffs on imports of U. S. timber in trade frictions, which have a significant trade inhibitory effect on imports of U. S. timber. In the long term, China will increase its dependence on imports of American timber, especially of American log. The concentration of raw wood import market will increase. If the concentration of raw wood import market is too high, the timber exporters will implement the prohibition of logging and export restrictions, and China's raw wood import will be seriously affected. Therefore, China needs to adjust the source structure of log import and disperse the risk of log import. Although the concentration of sawn timber import market will decline, the risk of sawn timber import market is still large. In order to ensure the stable supply of timber resources in China and reduce trade risk, the diversification of import market should be realized. It is necessary to pay attention to measuring the export output elasticity of timber exporting countries, evaluating and tracking the supply security of major timber exporting countries, and reducing the import risks of log and sawn timber. Finally, we should strengthen foreign trade negotiations with timber exporters, establish good foreign trade relations, and promote the stability of the timber trade environment. [ABSTRACT FROM AUTHOR]