通过对三门峡大坝附近大安地震台的定点形变资料的分析，简述了地壳形变对大坝位移观测的影响。论述认为，大坝的位移除了自身的因素外，还受控于大坝周边的地壳形变，特别是在有活动断层的附近，这种影响更加明显。把大坝的周边地壳形变观测和大坝的内外观测有机的结合起来，对更好分析大坝的各种观测资料并将其用于大坝安全监测将起到积极作用。 Through the analysis of fixed point deformation data of Daan Seismic Station near Sanmenxia Dam, the influence of crustal deformation on dam displacement observation is briefly described. The dissertation argues that the displacement of a dam is controlled by its crustal deformation in addition to its own factor, especially in the vicinity of active faults. Combining the crustal deformation observation around the dam and the internal and external observation of the dam organically, it will play an active role in better analyzing various observation data of the dam and applying it to dam safety monitoring.