This paper describes new characteristics of the population migration, esp. spatial patterns of it and the features of population dynamics, in Beijing-Tianjin-Hebei region since 1990s. An econometric model has been employed for further analysis of and comparison between the factors influencing the migration in 1990 and those influencing the migration in 2000. The empirical results show that the disparity of per capita GDP has dominantly influenced the migration. Meanwhile, market and the upgraded industrial structure begin to show their muscles. Finally, some countermeasures have also been proposed in this paper.