Macro　mechanical　behavior　of　concrete　is　closely　related　to　its　micro-/meso-scale　structure.　Considering　the　influence　of　heterogeneity　of　interior　structure,　a　meso-scale　mechanical　model　was　established　to　study　the　effects　of　end　friction　confinement,　concrete　was　composed　of　aggregate　particles,　mortar　matrix　and　the　interfacial　transition　zones　between　the　two　phases.　Aiming　at　different　end　friction　confinements,　the　uniaxial　dynamic　compressive　mechanical　behaviors　of　concrete　subjected　to　different　medium　and　low　strain　rates　were　simulated.　Furthermore,　the　influence　mechanism　of　end　friction　confinement　on　the　uniaxial　dynamic　compressive　mechanical　properties,　especially,　the　compressive　strength　of　concrete　was　analyzed.　The　simulation　results　indicated　that　(1)　with　increase　in　end　friction　coefficient,　the　uniaxial　compressive　strength　of　concrete　increases　firstly　and　then　becomes　flat　under　the　same　loading　rate;　(2)　the　end　friction　confinement　changes　the　local　stress　state　and　damage　distribution　of　concrete,　and　it　contributes　to　the　increase　in　compressive　strength　of　concrete　obviously;　(3)　the　friction　contribution　factor　has　a　descending　tendency　with　increase　in　the　strain　rate,　and　it　decreases　obviously　when　the　end　friction　coefficient　increases　under　the　same　end　friction　confinemenr.　©　2016,　Editorial　Office　of　Journal　of　Vibration　and　Shock.　All　right　reserved.