Austenitic　stainless　steel　(ASS)　is　a　common　material　used　in　high-pressure　hydrogen　systems.　Prolonged　exposure　to　high-pressure　hydrogen　can　cause　hydrogen　embrittlement　(HE),　raising　significant　safety　concerns.　Selective　Laser　Melting　(SLM),　known　for　its　high　precision,　is　a　promising　additive　manufacturing　technology　that　has　been　widely　adopted　across　various　industries.　Studies　have　reported　that　under　certain　SLM　manufacturing　conditions　and　process　parameters,　the　HE　resistance　of　SLM　ASS　is　significantly　better　than　that　of　conventionally　manufactured　(CM)　ASS,　showing　great　potential　for　application　in　high-pressure　hydrogen　systems.　Thus,　studying　the　HE　of　SLM　ASS　is　crucial　for　further　improving　the　safety　of　high-pressure　hydrogen　systems.　This　paper　provides　an　overview　of　the　SLM　process,　reviews　the　mechanisms　of　HE　and　their　synergistic　effects,　and　analyzes　the　HE　characteristics　of　SLM　ASS.　Additionally,　it　examines　the　influence　of　unique　microstructures　and　SLM　process　variables　on　HE　of　SLM　ASS　and　offers　recommendations　for　future　research　to　enhance　the　safety　of　high-pressure　hydrogen　systems.　©　2025