Abstract：By using the elevation data and Airy model, the Moho depth can be calculated. Through applying Parker’s formula, the isostasy gravity correction of the crustal deformation can be obtained as well. Therefore, the isostasy gravity anomalies gained by subtracting the corrections from observed Bouguer anomalies approximately represent the isostatic features of Chinese capital area, which plays an important role for investgating the deep structure and earthquake prediction in the future. The results show that the isostatic value which is of around ±20×10 -5 ms -2 in eastern part of capital and its adjacent areas, indicates that basically isostatic has been reached, while some places in west and north of capital area are still in unisostitc status.
