The spatial patterns and stratification of soil bulk density in the temperate grassland of Northern China remain undefined because of the complex geographical conditions. In this study， we used measured data for soil bulk density available in reports of soil surveys of temperate grasslands of Northern China， and constructed a soil transfer function from the surface soil bulk density. Accordingly， we reconstructed vertically stratified bulk density data of the soil profile， and estimated the pattern of soil bulk density in the horizontal plane. In these analyses， the soil bulk density of the temperate grasslands of Northern China was typically high in the central and northwestern regions and low in the eastern and mountainous regions. The mean soil bulk density of grasslands was 1.50 g·cm-3. According to geographical divisions， the highest soil bulk density was in the South Xinjiang Basin （mean soil bulk density， 1.99 g·cm-3）， and the lowest was in the Altai Mountains （mean soil bulk density， 1.03 g·cm-3）. Based on data obtained from various types of grasslands， the soil bulk density was lowest in alpine meadow grassland （mean soil bulk density， 0.76 g·cm-3） and highest in temperate desert grassland （mean soil bulk density， 1.80 g·cm-3）. The mean prediction error， root mean square deviation， relative error， and multiple correlation coefficient of soil bulk density data pertaining to the surface layer （0-10 cm） in the temperate grasslands of Northern China were 0.018， 0.223， 16.2%， and 0.5386， respectively.
