本文首次论述了变形体系统是一个灰色系统,进而分析了变形观测数据的一些灰色特征,为灰色系统理论在变形分析中的应用打下理论基础,并通过某土石坝沉降变形分析,阐述了变形体变形性态的灰色评估方法。 This paper discusses for the first time that the deformable body system is a gray system, and then analyzes some gray features of the deformation observation data, lays a theoretical foundation for the application of the gray system theory in the deformation analysis, and describes the deformation body through the settlement deformation analysis of an earth-rock dam. Grey evaluation method of deformability.