High-strength　steel　has　excellent　mechanical　properties　and　develops　rapidly,　but　the　toughness　of　weld　metal　cannot　be　well　solved,　which　hinders　the　large-scale　application　of　high-strength　steel　to　a　certain　extent.　Thus　it　is　urgent　to　improve　the　strengthening　and　toughening　mechanism　of　high-strength　steel　weld　metal　and　develop　the　corresponding　welding　consumables.　This　paper　summarizes　current　main　research　methods　of　the　influence　of　alloying　elements　on　the　microstructure　transformation　and　mechanical　properties,　and　the　effects　of　alloying　elements　on　the　strength　and　toughness　of　high-strength　steel　weld　metals.　It　briefly　analyzes　the　influence　mechanism　of　alloying　elements　on　microstructure　transformation　and　the　relationship　between　alloy　composition,　microstructure　transformation　and　mechanical　properties.　It　is　found　that　the　multiple　phase　microstructure　composed　of　bainite　and　acicular　ferrite　can　make　the　weld　metal　obtain　good　toughness.　In　addition,　the　paper　also　discusses　future　development　trend　of　high-strength　steel　welding,　providing　the　guidance　on　the　research　and　application　of　high-strength　steel　welding　consumables.