In-situ β-Zr/ Zr-based metallic glass matrix composites with diameter of 3 mm were fabricated by conventional Cu-mold casting method and the wear behavior underSdrySslidingScondition of the composites were investigated. The results indicate that compared to the pure BMG, the composites exhibited a markedly improved wear resistance. The composites showed lower friction coefficient and wear rate than the pure BMG. The lowest wear rate in these composites is 48.1% lower than that of the pure BMG. Meanwhile, the worn surface of a proper amount of composite is less severe and there were shallow grooves with some fine wear debris on the worn surface, which exhibited the characteristic of mild abrasive, whereas that of the pure BMG is characterized by flakes, delamination, pile-up and deep grooves which show a severe abrasive wear mode. The improvement of the wear resistance of the composites is attributed to the fact that the β-Zr crystalline phase distributed in the amorphous matrix has some effective load bearing, plastic deformation and work hardening ability to decrease strain accumulation and the release of strain energy in the glassy matrix, restrict the expanding of shear bands and cracks, and occur plastic deformation homogeneously.