关键词: 新发展格局, 价值链, 增加值解构, GDP, 区域互动

Abstract: This paper constructs the valueadded decomposition model of dual circulation and the economic value added （GDP） accounting model in the dual circulations framework from the perspective of value chain，and uses the OECDAMNE database to analyze the valueadded composition of Chinas dual circulations，the characteristics of domestic and international interaction and its contributions to Chinas GDP The results show that：Firstly，the scale of Chinas domestic circulation is higher than that of the international circulation；and in terms of ownership type，domesticowned firms are the largest market players in the dual circulations，but the international circulation is better than the domestic circulation in terms of the ability to create value added Secondly，the foreign value added contained in Chinas domestic circulation mainly comes from East Asia and other regions，while the domestic value added created by China mainly flows to North America and other regions through the international circulation，which shows the regional asymmetry in the source and destination of value added in Chinas domestic and international circulations Thirdly，the domestic circulation contributes to more than 70% of Chinas GDP，and the GDP contributed by domesticowned firms is significantly higher than that by foreignowned firms Finally，the proportions of domestic value added in the domestic and international circulations，the GDP contributed by the domestic circulation and contribution to the GDP of the world by the international circulations of China are slightly lower than those of the United States，but they show an excitingly growing trend from 2005 to 2016 in China China should further tap into the potential of domestic demand and open up wider to the world，and leverage the comparative advantages of domesticowned and foreignowned firms to accelerate the building of the new development paradigm and to contribute to the steady and longterm growth of the Chinas economy

Key words: new development paradigm, value chain, value added decomposition, GDP, regional interaction