From 1999 to 2007，an obvious convergence of wage increase has happened in China'seastern and west-central regions.And what is main reason for it？From an analytical framework of comparative advantage theory and new economic geography theory we revealed labour mobility and west-central region's industrialization af ectchina'seconomy.The deregulation of labour mobility encourages the migration of labour factor，and promote the the labour factor-price equalization. The west-central regions promote the labour price factor increase through developing thesecond and third industry. If this continues，it will push the balance development of wage increase in coastal and hinterland regions.