In　recent　years,　mechanization　and　greening　have　become　the　inevitable　trend　of　agricultural　development.　Plant　factories　have　the　advantages　of　high　planting　area　efficiency,　stable　crop　growth　and　continuous　production.　Although　its　demand　and　scale　are　increasing,　there　is　still　a　lack　of　low-carbon　research　on　the　layout　of　plant　factory,　which　leads　to　the　restriction　of　actual　production　capacity　and　unnecessary　waste　of　resources　and　environmental　burden.　Therefore,　this　paper　takes　a　leafy　vegetable　processing　plant　factory　as　the　research　object　and　puts　forward　a　plant　layout　design　based　on　the　improved　system　layout　planning　(SLP)　method　for　the　design　requirements　of　high　yield,　high　efficiency　and　low　carbon.　In　this　paper,　the　initial　layout　plan　of　a　vegetable　processing　plant　is　output　by　combing　the　plant　foundation　data　(PQRST)　needed　for　layout　planning,　analyzing　and　quantifying　the　logistic,　carbon　emission,　and　non-logistic　relationships　among　the　operating　units.　And　draw　the　position　correlation　map　and　the　area　correlation　map　based　on　the　integrated　relationship,　and　correct　them　according　to　the　actual　constraints　and　restrictions.　For　the　three　alternative　layout　schemes　of　the　plant　factory　based　on　the　improved　SLP　method,　the　material　flow　volume　and　carbon　emission　factors　of　the　schemes　are　calculated　and　analyzed,　and　the　optimal　layout　scheme　2　is　determined　according　to　the　results.　Combined　with　the　parameter　design　scheme　of　the　production　line,　the　layout　scheme　of　the　vegetable　processing　plant　and　the　factory　simulation　software,　the　detailed　design　of　the　layout　factory　simulation　model　is　established,　and　the　original　scheme　is　compared　with　the　new　scheme　to　verify　the　design　effect.　©　INTERNATIONAL　JOURNAL　OF　INDUSTRIAL　ENGINEERING.