Noble　single-atom　catalysts　have　rapidly　been　attracting　attention　due　to　their　unique　catalytic　properties　and　maximized　utilization.　Atomic　layer　deposition　(ALD)　is　an　emerging　powerful　technique　for　large-scale　synthesis　of　stable　single　atom.　In　this　review,　we　summarize　recent　developments　of　single　atom　synthesized　by　ALD　as　well　as　explore　future　research　direction　and　trends.　©　2017　Dalian　Institute　of　Chemical　Physics,　the　Chinese　Academy　of　Sciences