The　development　and　application　of　light　aggregate　concrete　blocks　are　considered　as　one　of　the　key　issue　that　promote　the　energy　saving　and　emission　reduction　in　construction　and　building　materials　industries.　In　this　paper,　the　greenhouse　gas　(GHG)　emissions　of　light　aggregate　concrete　blocks　during　the　whole　life　cycle　were　analyzed　based　on　life　cycle　assessment　(LCA)　methodology.　The　results　demonstrated　that　the　amount　of　GHG　emissions　of　the　light　aggregate　concrete　block　was　174　kg/m3　in　the　system　boundary　of　‘from　cradle　to　gate’.　The　direct　GHG　emissions　was　51.　31　kg/m3　accounting　for　28.　46%　of　the　aggregate　emission,　while　the　indirect　GHG　emissions　was　124　kg/m3.　The　cement　production　and　the　concrete　block　production　were　the　main　contributors　to　the　total　emissions.　According　to　the　sensitivity　analysis,　the　GHG　emissions　amount　was　quite　sensitive　to　the　amount　of　cement　and　ceramsite　consumption.　©　2017　Trans　Tech　Publications,　Switzerland.