Abstract: In this paper,several techniques were used to improve the arithmetic of satellite laser altimetry ground track crossover elevation change time series,and to construct the elevation change time series using the satellite laser altimeter crossover elevation difference in the single and different laser operation periods of ICESat to detection the trend of ice sheet elevation change in the Enderby Land region of the east Antarctica,the elevation change rate we got is 4.79 0.13cm per year from 2003 to 2007 in this region.