There exists a Granger causality in the relationship between the economic growth and the income gap between urban and rural dwellers in China.Lack of rectification of the urban and rural gap will definitely affect and constrain the sustainable development of the nation's economy.In the context of the severe unbalance of urban and rural structure,unilateralist pursuit of the economic fast-growth will also deteriorate income gap between urban and rural dwellers,resulting in jeopardizing the construction of th...