A polystyrene (CH)/aluminum (Al) dual-layer perturbation target for hydrodynamic instability experi-ments in inertial confinement fusion (ICF) was designed and fabricated. The target was composed of aperturbed 40 m Al foil and a CH layer. The detailed fabrication method consisted of four steps. The 40 mAl foil was first prepared by roll and polish process; the perturbation patterns were then introduced onthe surface of the Al foil by the single-point diamond turning (SPDT) technology; the CH layer was pre-pared via a simple method which called spin-coating process; finally, the CH layer was directly coatedon the perturbation surface of Al foil by a hot-press process to avoid the use of a sticker and to eliminatethe gaps between the CH layer and the Al foil. The parameters of the target, such as the perturbationwavelength (T) and perturbation amplitude (A), were characterized by a QC-5000 tool microscope, analpha-step 500 surface profiler and a NT1100 white light interferometer. The results showed that T and Aof the target were about 52 μm and 7.34 μm, respectively. Thickness of the Al foil (H1), thickness of theCH layer (H2), and cross-section of the dual-layer target were characterized by a QC-5000 tool micro-scope and a scanning electron microscope (SEM). H1 and H2 were about 40 μm and 15 μm, respectively,the cross-sectional photographs of the target showed that the CH layer and the Al foil adhered perfectlywith each other.