Abstract: Residential mobility is becoming the main part of population migration.Relying on the data from a large-scale telephone survey throughout Beijing in 2008,the paper discusses the level of residential mobility in Beijing and its influencing factor.From the number and rate of mobility,the residential mobility level is not high in Beijing.After the reform and opening up,mobility rate keeps a fast rising with the development of urban construction and the promotion of freedom to choose their residence and domicile,except in the late 1980s and early 1990s,which is a platform period.Family features affect its move tendency,and the age,education,housing ownership,household registration and the room age have the significant effect on the move probability within five years.