The growth, crystalline structure and magnetism of Fe/Mn/fcc-like Fe/Cu3Au(001) are characterized by medium energy electron diffraction (MEED), low energy electron diffraction (LEED) and magneto-optical Kerr effect (MOKE). Compared with Fe/Mn/Cu3Au(001), there are some interestingfindings in magnetism of Fe/Mn/fcc-like Fe/Cu3Au(001). With the fcc-like Fe buffer layer, the crystalline structure of Mn/fcc-like Fe/Cu3Au(001) is still face-centered cubic(fcc) structure at low coverage. The key factor responsible for the extraordinarily enhanced coercivity in perpendicular direction of the Fe overlayer and shifted critical thickness of spin-reorientation transition (SRT) is attibuted to the perpendicular magnetization of fcc-like Fe buffer layer.