With the development of globalization process，Northeast Asia，main countries like China，South Korea and Japan，have become the world’s most dynamic region of manufacturing industry. Japanese enterprises，especially multinational corporations established their vertical industrial division by making use of the development gap between countries and their own advantages. The fragmentation that the whole production process divided into number of intermediate product manufacturing and final product assembly have been forming in Northeast Asia，and the trade and investment cooperation between China and Japan are also evolving in this process. Today，the domestic manufacturing industry is entering a period of adjustment in the two countries，economic and trade cooperation between them are faced with the situation of adjustment，transformation and upgrading.