Here,　to　improve　mechanical　performance　of　recycled　concrete　(RC),　recycled　concrete　was　improved　with　basalt　fiber　and　nano　silica　as　reinforcement　to　form　a　composite　modified　recycled　concrete　with　basalt　fiber　and　nano　silica.　Through　static　compressive　performance　tests　and　split　Hopkinson　pressure　bar　tests　(SHPB),　effects　of　basalt　fiber　and　nano　silica　on　failure　mode　and　static　and　dynamic　compressive　strength　of　modified　recycled　concrete　were　studied.　The　results　showed　that　with　increase　in　strain　rate,　failure　mode　transits　from　complete,　fracture　to　crushing,　and　dynamic　compressive　strength,　dynamic　enhancement　factor　and　specific　energy　absorption　all　increase;　the　replacement　rate　has　no　regular　effects　on　failure　mode,　dynamic　compressive　strength　and　specific　energy　absorption　of　test　block,　but　static　compressive　strength　decreases　with　increase　in　replacement　rate;　basalt　fiber　is　beneficial　to　enhance　the　integrity　of　test　block　during　failure　to　improve　static　compressive　strength,　dynamic　compressive　strength,　peak　strain　and　specific　energy　absorption　of　recycled　concrete;　nano　silica　is　beneficial　to　improve　static　compressive　strength,　dynamic　compressive　strength,　peak　strain　and　specific　energy　absorption　of　recycled　concrete;　so,　basalt　fiber　and　nano　silica　can　enhance　static　and　dynamic　mechanical　performances　and　energy　dissipation　performance　of　recycled　concrete.　©　2021,　Editorial　Office　of　Journal　of　Vibration　and　Shock.　All　right　reserved.