针对大坝变形数据处理中使用少数据观测值进行预测的问题，对大坝水平位移值应用灰色预测作了较好的预测，对ＧＭ模型的初始值解算作了全新的研究。经对大量不同的实例数据计算取得了较好的拟合和预测精度，从而表明灰色预测对大坝变形分析是一种适用的数据处理方法 Aiming at the problem of forecasting the dam deformation data using few data, the gray prediction of the horizontal displacement of the dam is made a good prediction, and a new research on the initial value calculation of the GM model is made. After a large number of different examples of data obtained good fitting and prediction accuracy, indicating that the gray prediction of dam deformation analysis is a suitable data processing methods