A new Fe-based amorphous-crystalline com-posite without non-metallic elements,Fe55Cr15Mo15 Ni10W5,was prepared by melt-spinning.The formation ability and structure information were investigated by X-ray diffractometer(XRD),energy-dispersive spectrom-eter(EDS)and scanning electron microscope(SEM).The mechanical properties of the amorphous-crystalline com-posite were investigated by nanoindentation.A molecular dynamics simulation study was performed to simulate the formation of Fe55Cr15Mo15Ni10W5 amorphous alloy.The mechanical properties were obtained by compression sim-ulations simultaneously.The results indicate that the Fe55Cr15Mo15Ni10W5 ribbon is an amorphous-crystalline composite structure with good ductility,and the hardness of the amorphous-crystalline composite is about 75％higher than that of master ingot.The simulation mechani-cal properties are in good agreement with the results of nanoindentation at the nanoscale.