A method of pre-piecing the foam to form resin glue nails in the foam core is proposed to address the disadvantage of poor interlayer behavior of plain foam core sandwich composites， and low-velocity impact behavior of perforated foam core sandwich composites is investigated. Perforated foam core sandwich testing pieces are made by hand-pasting and vacuum assisted manufacturing process， and low-velocity impact tests with different energies are performed on these pieces to obtain the mechanic responses， such as contact forces， crosshead displacements， and energy absorbing ratios. The extension of low-velocity impact damages are determined by methods of visually inspection and nondestructive inspection with ultrasonic C-scan. It is known from the testing results that the maximum contact forces， the maximum impactor displacements， and residual deformation increase with the increasing of impact energy， indentation and internal damage area also increase， while energy absorbing ratio of the structure is promoted as well. Low-velocity impact resistance of perforated foam core sandwich composites can be improved by enhancing nail densities and foam groove widths moderately， while hole depth has little effects on its impact performances.