The　experiments　under　biaxial　tensile-compressive　(T-C)　complex　stress　were　carried　out　for　two　kinds　of　substitution　percentages　of　recycled　coarse　aggregate　(RCA)　on　biaxial　proportional　loading　(alpha　=　sigma(1):sigma(3)　=1:0,　0:　-1,　0.05:　-1,　0.1:　-1,　0.25:　-1,　0.5:　-1,　1:　-1　and-1:　-1)　and　four　loading　deformation　rates　of　10(-5)/s,　10(-4)/s,　10(-3)/s,　and　10(-2)/s.　The　research　was　completed　in　the　static-dynamic　true　triaxial　machine.　The　experimental　phenomena　indicate　the　tensile　failure　appears　in　these　specimens　of　recycled　aggregate　concrete　(RAC)　under　biaxial　T-C　stress　states.　The　dynamic　mechanical　behavior　for　RAC　under　biaxial　T-C　loadings　was　affected　by　the　strain　rates,　stress　ratios　and　its　substitution　percentages　of　RCA.　Accompanied　by　the　increase　of　strain　rates,　its　strength　of　RAC　is　improved.　As　the　tensile　stress　increases,　its　compressive　strength　decreases.　The　T-C　strengths　for　RAC　under　biaxial　T-C　states　are　less　than　its　corresponding　uniaxial　T-C　strengths　at　a　certain　identical　strain　rates,　respectively.　Considering　the　effect　of　loading　rates,　a　new　tensile-compressive　failure　criterion　is　established　under　complex　stress　states.