Abstract: Quartz fiber reinforced resin matrix composites drilled with the blind holes of various diameters and various depths were prepared in order to simulate defects of air voids or delaminations under the surface of the material. Taking the single blind hole as the research object, the analysis model of 100 mm×100 mm is established. Finite element analysis of thermal loading laser shearography testing for composite materials was carried out by sequential coupled thermal stress analysis method. The influence of thermal loading, heating time, cooling time and the diameter and depth of blind holes on the signal of laser shearography testing was studied. The results indicate that increasing thermal loading and heating time can effectively improve defects detection effect; extending the cooling time cannot improve the defects detection effect, but reduces the detection efficiency. The bigger diameter and the smaller depth of blind hole, the easier the defect is to be detected, the blind holes of 5 mm diameter with different depths cannot be effectively identified.