Abstract：The latest ultrahigh-order earth gravitational model EGM2008(Earth Gravitational Model) was briefly introduced in this paper.The odder of the model can reach up to 2159,the parameters which could expand it to 2190 order are provided.Regarding the GPS/leveling data measured in 3 representative regions in China,the accuracy of the model were analyzed and evaluated,so we know that error precision between the heights calculated from EGM2008 in the 3 regions and the leveling heights in China's height system is within 1 meter,which can meet the need of precision requirement in electrical,magnetic and chemical exploration,for gravity exploration,based on the EGM 2008 model the leveling points in the survey region were utilized to conduct adjustment correction or surface fitting for the GPS physical point heights,so the survey data of every physical points were obtained.
