The　high　optical　reflectivity　and　thermal　conductivity　of　copper　make　it　challenging　to　form　fully　dense,　highstrength,　and　high-conductivity　copper　alloy　parts　through　laser-based　additive　manufacturing.　In　this　paper,　a　new　method　for　manufacturing　high　strength　and　conductivity　copper　alloy　components　by　using　optical　absorption　GNSs-coated　copper　powder　and　LPBF　technology　is　proposed.　The　densification　behavior,　microstructure　evolution,　mechanical　properties,　and　electrical　and　thermal　conductivity　of　GNSs/CuCrZr　composites　prepared　by　laser　powder　bed　fusion　under　different　process　parameters　were　studied.　The　high　density　of　99.58　%　was　obtained　by　optimizing　the　process　parameters.　With　the　increase　of　Ea,　the　grain　size　of　the　cross　section　is　fine　and　uniform.　The　columnar　grains　in　the　longitudinal　section　are　slender　and　grow　epitaxially　along　the　deposition　direction.　The　yield　strength,　ultimate　tensile　strength,　and　total　elongation　at　break　are　220　MPa,　285　MPa,　and　30　%,　respectively.　This　is　due　to　the　generation　of　uniformly　dispersed　and　fine　precipitates　and　high-density　dislocations.　In　addition,　the　interface　characteristics　and　formation　mechanism　of　GNSs/CuCrZr　composites　were　also　discussed　by　first-principles　calculations　and　experimental　studies.　The　interface　between　GNSs　and　CuCrZr　is　well-bonded,　and　there　is　a　good　agreement　between　the　calculated　and　experimental　data.