Stereolithography　of　ceramic　precursors　is　a　valuable　additive　manufacturing　technology　for　complex　ceramic　parts.　In　this　study,　a　new　SiC　ceramic　precursor-liquid　hyperbranched　polycarbosilane　(LHBPCS)　grafting　acrylate　group　was　synthesized　by　chlorinating　some　Si-H　groups　of　LHBPCS　with　Cl-2　followed　by　reacting　with　hydroxyethyl　acrylate.　The　reaction　processes　and　structures　of　intermediate　reactant　and　target　product　were　confirmed　by　FT-IR　and　H-1　NMR.　According　to　photolithography　experiment　and　hardness　test　under　UV　light,　the　synthesized　LHBPCS　had　high　photo-curing　activity.　Thermogravimetric　analysis　indicated　it　also　possessed　high　ceramic　yield　(the　ceramic　yield　at　1000　degrees　C　was　74.4%).　After　shaping　with　stereolithography,　defect-free　green　bodies　could　be　got.　When　heated　to　1000　degrees　C,　the　transparent　yellow　green　bodies　transformed　into　black　SiC　rich　ceramic　parts　and　18.3-25.1%　linear　shrinkage　associated　with　the　precursor-to-ceramic　conversion　was　observed.　Because　the　shrinkage　in　the　pyrolysis　stage　was　nearly　isotropic　and　the　shrinkage　was　lower　than　other　reported　data,　no　obvious　deformation　or　crack　was　found　in　the　pyrolyzed　parts.