In this paper, we analyze statistics data of international trade and intra-regional trade within East Asia. According the trade data, we also study and compare the trade characteristics of free trade region such as the East Asia and the EU, NAFTA, and we indicate the new feature of internal trade which predominately based on intermediate goods and components trade and the significant role of multinational firms to East Asia's economic growth during the economic integration development in East Asian region. It is contrasted the new selection trends of production allocation among the multinational firms in East Asia. And we analyze model industrial production and organization network and the characteristics from the aspects of FDI, outsourcing, fragmentation. Finally, We preview the effects such as the ecological environments, labor and employment, formation of leading industry, social responsibility of multinational firms in the East Asian countries by the multinational firms' production chain production organization model.