Nano　SiC　doped　MgB2　bulks　are　fabricated　by　using　both　SPS　(Spark　Plasma　Sintering)　technique　and　conventional　sintering　method.　It　was　found　that　the　denser　MgB2　bulks　could　be　synthesized　through　the　SPS　technique.　The　density　of　the　SPS　sintered　bulks　reachs　2.0853　g/cm3　which　is　90%　of　the　theoretical　density　of　MgB2　material,　being　30%　higher　compared　to　that　of　the　bulks　made　by　conventional　method.　The　observation　of　the　micrograph　of　the　SPS　sintered　MgB2　bulk　reveals　that　the　surface　of　the　bulk　is　very　uniform　and　dense.　Meanwhile,　The　Jc　of　the　sample　reaches　2.6　×　105　A/cm2　(20　K,　0　T),　which　was　increased　by　18%　and　44%　(20　K,　4　T)　compared　to　that　of　the　sample　prepared　by　conventional　method,　respectively.　It　is　demonstrated　that　superconductive　MgB2　bulks　with　high　density　can　be　obtained　through　a　high　pressure,　short　and　quick　processing　route　of　SPS　which　is　different　from　conventional　method.　The　superconductivity　of　MgB2　bulks　is　expected　to　be　improved　by　the　further　understanding　of　the　SPS　sintering　mechanism.