A method for preparing pure rhenium metal parts belongs to the technical field of powder metallurgy. First, a jet mill device is used to process the raw rhenium powder with secondary jet milling technology to obtain a nearly spherical rhenium powder with good fluidity, uniform dispersion and narrow particle size distribution, so that it can be directly used for selective laser melting (SLM) Forming use. Then the rhenium powder is reduced in a hydrogen atmosphere to reduce its oxygen content and improve its sintering activity. At the same time, the three-dimensional schematic diagram of the complex-shaped rhenium metal parts is designed through computer modeling software and the optimal processing parameters (such as scanning speed, scanning distance, scanning layer thickness and scanning direction, etc.) are set, and parameter files are exported to realize modeling. Finally, the powder is laser-melted and formed into a selected area to prepare rhenium metal parts with complex shapes. The invention significantly improves the sphericity, fluidity and sintering activity of the raw material powder, and optimizes the selective laser melting (SLM) processing parameters, and the prepared rhenium metal parts have low oxygen content and are nearly completely dense.
