Metallic glasses have recently attracted great attention in terms of degrading dyes and other organic pollutants as an environmentally friendly material for wastewater remediation. Herein, we report a new type of amorphous catalyst Fe41Co7Cr15Mo14C15B6Y2 hollow balls. Results demonstrate that the catalyst can still completely decolorize the 20 mg/L methylene blue (MB) solution after reused for 50 times under conditions of pH = 5, catalyst content 0.5 g/L, and temperature 80 °C. The catalyst is easily broken during degradation, so the inner surface also provides additional active sites. The Fe41Co7Cr15Mo14C15B6Y2 amorphous alloy hollow balls were characterized by energy dispersive X-ray specroscopy (EDS), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), respectively. The elements in the catalytic system have a synergistic catalytic effect. Redox cycle Fe2+/Fe3+, Co2+/Co3+ and Mo4+/Mo6þpromote mutual conversion and accelerate the catalytic process of their reaction with H2O2, forming a self-stable redox cycle process. Among them, Fe2+ promotes the conversion of Co3+ to Co2+, and Mo4þpromotes the conversion of Fe3+ to Fe2+, mainly Fe2+ and Co2+ react with H2O2 to generate ·OH. Mo and Cr elements form MoO2 and Cr2O3 plasma compounds on the surface, which act as a protective film to make the catalyst more stable and be repeated used more frequently.