High　entropy　alloys　(HEAs)　have　gained　significant　attention　in　electrocatalysis　research　due　to　their　distinctive　multi-element　composition,　intricate　electronic　structure,　and　superior　properties.　By　harnessing　multi-component　synergy,　precise　electron　regulation,　and　the　high-entropy　effect,　HEA　electrocatalysts　exhibit　remarkable　catalytic　activity,　selectivity,　and　stability.　These　materials　demonstrate　outstanding　catalytic　performance　in　a　variety　of　electrocatalytic　small　molecule　reduction　reactions,　including　oxygen　reduction　(ORR),　hydrogen　evolution　(HER),　and　CO2　reduction　(CO2RR),　making　them　promising　candidates　for　clean　energy　conversion　and　storage　applications,　including　fuel　cells,　metal-air　batteries,　water　electrolysis,　and　CO2　conversion　technologies.　This　review　highlights　recent　advancements　in　HEA　electrocatalyst　research,　focusing　on　their　synthesis,　characterization,　and　applications　in　electrocatalytic　small　molecule　reduction　reactions.　It　also　explores　the　underlying　mechanisms　of　the　high-entropy　effect,　multi-component　synergy,　and　structural　design.　Finally,　it　discusses　key　challenges　that　remain　in　the　application　of　HEAs　for　electrocatalytic　small　molecule　reduction　and　outlines　potential　directions　for　future　development　in　this　field.　©　Higher　Education　Press　2025.