This paper discusscs systemically thc migration regional patterns and its characterist ics in Yangtze River Delta, China. It includes the following three aspects mainly: (1) the distribution of migration scale of cities in Yangtze River Delta; (2) the destination choice of inter-provincial immigration outside the region; (3) the flows of inter-urban migration in the Delta. And the development of metropolis in Yangtze River Delta has been discussed from an angle of view.