As　one　of　the　most　electrochemical　energy　storage　devices,　lithium-ion　batteries　(LIBs)　remain　the　workhorse　of　the　energy　market　due　to　their　unparalleled　advantages.　Remarkably,　Si-based　materials　play　a　pivotal　role　in　LIBs　anodes　owing　to　ultrahigh　theoretical　capacity　of　Si　and　rich　natural　resources.　However,　bulk　silicon　materials　are　difficult　to　meet　the　current　commercial　demand　because　of　their　low　conductivity,　sluggish　reaction　kinetics,　and　huge　volume　expansion.　The　construction　of　porous　structures　has　been　acknowledged　as　an　effective　way　to　solve　the　above　issues.　Herein,　the　delicate　design　of　porous　Si-based　anode　materials　including　synthetic　strategies,　the　engineering　of　surface　morphology　and　micro/nano-structure,　and　the　regulation　of　different　compositions,　as　well　as　their　applications　in　LIBs　is　systematically　summarized.　Particularly,　the　fine　engineering　of　different　pore　parameters　for　Si-based　materials　is　on　focus.　Importantly,　the　relationship　between　thick　electrodes　and　tortuosity/porosity,　and　the　structural　effect　between　pores　and　battery　performance　are　also　discussed　in　depth.　Finally,　the　applications　of　porous　Si-based　anodes　in　full-cells　and　their　commercial　achievements　are　briefly　described.　This　review　is　expected　to　provide　a　basic　understanding　and　deep　insight　into　developing　porous　Si-based　anodes　for　high-energy　lithium　storage.