Abstract: 1 mm thick samples of (Zr₅₅Cu₃₀Ni₅Al₁₀)_98.5N_1.5and Zr₅₅Cu₃₀Ni₅Al₁₀bulk metallic glasses （BMGs） were prepared by copper mold suction casting method,and the samples were heat treated at 300℃for 5 min and 20 min,respectively.The surface structure,thermal stability,hardness and tribological property of the samples were examined using X-ray diffractometer （XRD）,differential scanning calorimeter （DSC）,microhardness tester and tribological wear tester.The results show that the samples are amorphous before and after heat treatment,and the heat treatment has little effect on the thermal stability of the alloys.However,the microhardness of Zr₅₅Cu₃₀Ni₅Al₁₀and (Zr₅₅Cu₃₀Ni₅Al₁₀)_98.5N_1.5samples decrease from 464.9HV and 480.9 HV to 454.7 and 471.2 HV,and then increase to 478.4 HV and 490 HV with the expansion of holding time,and the friction coefficients increase from 0.77 and 0.73 to 0.94 and 0.78,and then decrease to 0.76 and 0.72,respectively.(Zr₅₅Cu₃₀Ni₅Al₁₀)_98.5N_1.5sample exhibits a maximum hardness value,a minimum friction coefficient and the lowest wear rate of0.6×10^-3mm~3·N^-1·m^-1at 20 min of holding time.The heat treatment changes the wear type of Zr₅₅Cu₃₀Ni₅Al₁₀sample from corrosion wear,abrasive wear and adhesive wear to abrasive wear and adhesive wear.However,the heat treatment does not change the wear type of (Zr₅₅Cu₃₀Ni₅Al₁₀)_98.5N_1.5sample,but its wear scar surface become smoother and the wear resistance is improved with the holding time increasing.