Abstract：Firstly, the modeling principle, model classification and simplified analysis method of composite panels subjected to low velocity impact are addressed. The models of delamination threshold load are introduced, including models based on fracture mechanics, shear strength theory, as well as the improved model that takes account of the wrapping effect due to plate deflection. The delamination model of co-cured zone is presented. The working principles, data processing and use precautions of the dropping-weight-impact tester on composite panels are stated. Finally, the limitation in the current technology of impact-damage-resistance test and the development trend are discussed.