Based on the data of 2000 and 2010 population censuses in China，this paper investigates the spatial patterns of Chinese population mobility using spatial analysis methods．Visualized analysis and spatial autocorrelation analysis are conducted for intra- and inter-provincial population in-migration respectively at province，city and county levels．Results show that there is a significant trend of geographical concentration for inter-provincial migration from eastern coastal region to middle and western regions in China．Hotspots analysis verifies three nationwide agglomeration centers: Pearl River Delta，Yangtze River Delta and Beijing- Tianjin-Hebei Metropolitan Area．On these bases，this paper quantitatively identifies city attractiveness factors that respectively have impacts on intra－ and inter－provincial population in-migration at the city level，using ordinary multivariate regression and spatial regression models．Development of tertiary industry and local wage level both affect the choice of migration destinations for intra- provincial and inter- provincial floating population; local social public resources have significant impact on intra- provincial migration; high employment rate and high urbanization rate are“pulling”factors for inter-provincial migration．Policy implications are discussed．