Abstract: In order to find the effects of honeycomb material parameters on results in shearography NDT for honeycomb materials, calculations by finite element method are made.The theoretical formula of off-plane displacement of defect in shearography NDT for honeycomb materials is deduced based on the model of clamped circular thin plate under uniformly distributed load.The secondary development of Abaqus is made based on python, the process of shearography NDT for honeycomb materials is simulated by finite element method, the effects of load, defect size, skin thickness and honeycomb thickness on the maximum of off-plane displacement are analysed:when other conditions are fixed, the maximum of off-plane displacement is proportional to load and is the forth power of defect radius, it is inversely proportional to the third power of skin thickness and it has nothing to do with honeycomb thickness.Simulation by finite element method and experiment of shearography NDT for honeycomb materials are made, the reliability of simulation is verified, and simulation can provide theoretical guidance for practical detection.