In　order　to　investigate　the　cubic　strength　of　recycled　aggregate　concrete　(RAC),　33　specimens　were　designed.　Waste　electric　pole　concrete　(Used　50　years,　and　cubic　strength　is　C30)　crushed　as　recycled　coarse　aggregates,　33　recycled　aggregate　concrete　cubic　specimens(150　mmx150mmx150　mm)　are　mixed　in　11　kinds　of　different　recycled　coarse　aggregates　replacement　percentage,　every　kind　has　3　specimens.　And　the　replacement　percentages　recycled　coarse　aggregate　from　0　to　100%,　the　increment　is　10%.　The　failure　patterns　and　loading-displacement　curve　can　be　obtained　using　an　electro-hydraulic　servo　test　machine.　Based　on　the　experimental　results,　the　stress-strain　relationship　curve　of　different　recycled　coarse　aggregates　replacement　percentage　RAC　specimens　are　analyzed.　Research　results　shows　that　with　the　increasing　of　recycled　coarse　aggregates　replacement　percentage,　the　cubic　strength　of　RAC　have　slight　enhancements;　the　shape　of　stress-strain　relationship　curve　is　similar　between　RAC　and　normal　aggregate　concrete.