In　this　study,　a　silica　gel/liquid　nanoporous　energy　absorption　system　(NEAS)　is　developed　and　its　infiltration　behaviors　are　experimentally　studied.　The　relation　between　the　compressive　pressure　and　volume　of　the　silica　gel/liquid　NEAS　is　theoretically　derived　by　assuming　the　accumulative　infiltration　of　liquid　to　silica　gel　from　large　pores　to　small　pores　under　quasi-static　compression,　which　agrees　with　the　experimental　results　very　well.　Besides,　the　infiltration　behaviors　of　silica　gel/liquid　NEAS　can　be　further　tuned　by　sodium　chloride　(NaCl)　concentration　and　the　infiltration　pressure　increases　almost　linearly　with　NaCl　concentration.　This　work　is　the　first　study　to　quantitatively　correlate　the　compressive　pressure　and　nanoporous　structures　of　silica　gel　during　infiltration.　The　results　presented　herein　show　that　not　only　the　infiltration　pressure　of　silica　gel/liquid　NEAS　can　be　adjusted　by　NaCl　concentration,　but　also　the　compressive　pressure-volume　curve　can　be　tuned　by　the　distribution　of　the　size　of　the　nanopore　in　silica　gel,　which　may　be　beneficial　for　some　applications　of　NEAS　with　special　requirements　of　stress-strain　relation,　such　as　personal　protection,　vibration　absorber,　and　volume　memory　materials.　Published　under　license　by　AIP　Publishing.