The　absorption　of　laser　energy　by　pure　copper　powders　has　a　huge　impact　on　the　formation　of　high　quality　pure　copper　parts　by　selective　laser　melting.　In　this　paper,　surface　modification　technology　was　used　to　treat　pure　copper　powder　to　improve　the　laser　absorption　effect　of　pure　copper　powder.　It　was　found　that　modifying　the　surface　of　pure　copper　powder　to　generate　a　layer　of　CuO　film　effectively　improved　the　absorption　of　laser　energy　by　pure　copper　powder.　Uniform　and　dense　CuO　films　improved　the　quality　of　selective　laser　melting　pure　copper　parts,　which　solved　the　problem　of　preparing　pure　copper　powders　for　selective　laser　melting　of　high-density　parts.　The　microstructure　of　selective　laser　melting　high-density　pure　copper　parts　consisted　of　fine　columnar　and　cellular　crystals.　The　presence　of　subcrystals　and　dislocations　was　found　in　localized　areas.　The　results　of　the　physical　phase　analysis　showed　that　the　CuO　phase　existed　in　the　parts　prepared　from　the　surface-modified　pure　copper　powder,　and　the　presence　of　the　nano-CuO　phase　also　enhanced,　which　effectively　improved　the　microstructure　and　properties　of　the　constituent　selective　laser　melting　pure　copper　parts.