A method for preparing a reinforced steel shot relates to a method for preparing a metal product, in particular to a method for preparing a reinforced steel shot for metal surface treatment. The method for preparing the reinforced steel shot comprises the following process flow: material selection → wire drawing → cutting → screening → testing → storage, or: material selection → wire drawing → cutting → surface rounding and strengthening → screening → testing → storage. Since the reinforced steel shot of the present invention is produced by using a profile-spring steel wire that meets the requirements of element composition ratio and hardness deviation range as raw material, the density and element ratio of the reinforced steel shot are highly consistent. Since a brand-new process flow is adopted, the obtained reinforced steel shot will not have hollowness and surface cracks, the surface shape difference is small, the surface strength is high, and the service life is long.