We　report　the　first　experimental　observations　of　the　blockaded　six-　and　eight-wave　mixing　processes　in　a　collective　multi-level　Rydberg　atomic　ensemble　tailored　by　multi-channel　scissors　and　created　by　three　coexisting　electromagnetically　induced　transparency　(EIT)　windows.　The　interplay　between　the　dressed-state　effect　and　the　Rydberg　blockade　caused　by　strong　van　der　Waals　interactions　is　investigated　when　several　parameters　in　the　excitation　lasers　are　changed.　Blockaded　multi-wave　mixing　(MWM)　signals　are　obtained　when　the　coupling　frequency　detuning　is　changed,　which　is　improved　to　give　multiple　channels　when　the　probe　detuning　is　scanned.　Such　MWM　signals　tailored　by　EIT　scissors　produce　a　much　narrower　linewidth　and　therefore　are　suitable　for　application　in　long-distance　quantum　communication.　The　advantages　of　having　multi-channel　blockaded　MWM　signals　also　makes　potential　applications　in　demonstrating　multi-channel　entanglement　possible　and　improves　the　performance　of　quantum　computation　with　Rydberg　atoms.