On nuclear safety-valve vibration characteristics of the process of conducting dynamic analy- sis of nuclear safety and the important role of the assessment described using finite element analysis product vibration analysis of the practicality of technology,discussed the use of three-dimensional finite element analysis software-class nuclear safety valve vibration analysis of the basic idea and process.Ac- cording nuclear island parallel plate sluice valve design data to establish a three-dimensional model using 3-D finite element calculation method,according to a valve assembly,the proper handling of the con- tact surface and address computation and accuracy of contradictions,valves derived from the natural frequency of the former six bands is an important basis for calculating seismic valves.