The geoidal surface models of EGM96 and EGM2008 are respectively loaded in Trimble Business Center (TBC) software. Through the observation of GPS static data, the GPS control points and level elevation are fixed, and fitting height is calculated, which is compared with four standard results, and the results show that the EGM2008 geoidal model accuracy is better than the EGM96 geoidal model.%在Trimble Business Center(TBC)软件中分别加载EGM96与EGM2008两种大地水准面模型，通过观测的GPS静态数据，固定一个GPS控制点的水准高程，计算出各点的拟合高程，与四等水准成果进行对比，结果表明EGM2008大地水准面模型精度优于EGM96大地水准面模型。
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