Surface morphologies of Zr_(52.5)Al_(10)Ni_(10)Cu_(15)Be_(12.5) bulk metallic glass after being rolled at both a temperature around T_g and near (T_x-50) K were investigated with a scanning electron microscopy. Macroscopic and microscopic observation results show that squamae, cracks, steps and wedges exist on the surface when the samples were rolled at temperatures around T_g. However, a smooth and flat surface appears when the samples were rolled at temperatures near (T_x-50) K. These results indicate that the mode of deformation in the supercooled liquid region is a partially homogeneous flow at a temperature around T_g, and a fully homogeneous one at temperatures near (T_x-50) K. According to the results, it is more feasible to roll the amorphous alloys at temperatures near (T_x-50) K to obtain parts with smooth and flat surface. Surface morphologies of Zr_ (52.5) ​​Al_ (10) Ni_ (10) Cu_ (15) Be_ (12.5) bulk metallic glass after being rolled at both a temperature around T_g and near (T_x-50) K were investigated with a scanning electron microscopy . Macroscopic and microscopic observation results show that squamae, cracks, steps and wedges exist on the surface when the samples were rolled at temperatures around T_g. However, a smooth and flat surface appears when the samples were rolled at temperatures near (T_x-50) K. These results indicate that the mode of deformation of the supercooled liquid region is a partially homogeneous flow at a temperature around T_g, and a fully homogeneous one at temperatures near (T_x-50) K. According to the results, it is more feasible to roll the amorphous alloys at temperatures near (T_x-50) K to obtain parts with smooth and flat surface.