The effects of heat treatment on the hard magnetic properties and phase components are studied for amorphous Nd4Fe96-xBx alloys prepared by melt quenching technique. The crystallization temperature of amorphous Nd4Fe96-xBx alloys is higher than that of amorphous Fe100-xBx alloys at same B content in the range of 120-190 K. For 15≤x≤25, the samples crystallized from amorphous exhibit the hard magnetic properties, and consist of Nd2Fe14B, Fe3B and α-Fe. It is found that the intrinsic coercivity and magnetic energy product of the samples at optima1 heat treatment show a maximum of 2.8 kOe and 12 MGOe for Nd4Fe77B19 (x=19) alloy annealed at 670℃ for 2 min, respectively. These materials would presumably be used as an inexpensive bonded magnets, due to its higher values of Br and (BH)max.