With　economic　development　and　the　improvement　of　science　and　technology,　such　construction　machinery　as　rock　tunnel　boring　machines,　shield　machines,　raise　boring　machines,　and　road　headers　have　been　applied　unprecedentedly　to　underground　works.　Therefore,　the　testing　of　mechanical　rock　breaking　has　become　an　indispensable　experimental　means　for　construction　machines　used　in　underground　works　and　can　also　guide　the　design　and　operation　of　those　machines.　This　paper　introduces　a　new　mechanical　rock-breaking　testing　platform　developed　by　Beijing　University　of　Technology　that　is　designed　and　manufactured　by　considering　such　factors　as　the　influence　of　high　ground　stress,　cutterhead　rotation　and　rock　breaking　by　multiple　cutters　at　the　same　time.　Meanwhile,　other　cases　such　as　different　rock-breaking　tools　for　different　excavation　machines　and　different　rock　mass　structures　in　a　sample　box　are　taken　into　account,　which　makes　for　a　realistic　simulation　of　construction　conditions　onsite　for　different　cutting　tools.　The　testing　platform　consists　of　a　mechanical　system,　hydraulic　system,　automatic　control　system　and　data　acquisition　system.　The　completed　platform　has　been　used　for　several　tests　under　different　cases,　and　test　results　proved　that　this　platform　meets　its　design　requirements.　©　2016,　Editorial　Office　of　＂Modern　Tunnelling　Technology＂.　All　right　reserved.