A　2D　meso　models　of　recycled　concrete　with　different　sizes　is　established　using　the　base　force　element　method.　The　specimens　are　loaded　with　different　strain　rates.　The　meso　damage　of　recycled　concrete　is　analyzed.　In　addition,　the　structural　performance　of　specimens　under　the　joint　actions　with　strain　rate　and　size　are　also　studied.　The　simulation　results　find　that　the　compressive　strength　has　little　difference　when　the　values　of　strain　rates　are　lower　than　0.1　s(-1).　The　greater　the　strain　rates,　the　greater　the　difference　of　compressive　strength　between　different　sizes　when　strain　rates　are　larger　than　0.1　s(-1).　In　addition,　the　Bazant　statistical　theory　can　be　used　to　analysis　the　mechanical　properties　of　recycled　concrete.　Besides,　a　modified　formula　in　calculating　the　dynamic　size　effect　of　recycled　concrete　is　also　given　based　on　the　Bazant　statistical　size　effect　theory.