Due　to　the　fact　that　single　UV-cured　coatings　frequently　fail　to　fulfill　the　requirements　in　terms　of　depth　and　chroma,　and　do　not　reach　the　ideal　state　in　terms　of　comprehensive　performance.　In　order　to　solve　these　painpoints　more　effectively,　the　sulfhydryl-modified　castor　oil　(COME)　was　successfully　synthesized　by　introducing　beta-mercaptoethanol　onto　the　plant-based　material　castor　oil　(CO)　through　the　thiol-ene　clink　reaction.　Subsequently,　the　synthesized　polyurethane　acrylate　prepolymer　(COPUA),　monomer,　photoinitiator　and　thermocuring　agent　were　used　as　A　component,　and　COME　was　used　as　B　component.　The　two　were　mixed　evenly　according　to　a　certain　proportion,　and　the　modified　castor　oil　based　polyurethane　acrylate　(COMEPUA)　coatings　were　fabricated　by　UV/thermal　dual-curing　technology.　Based　on　a　series　of　performance　test　outcomes,　the　coating　demonstrates　excellent　comprehensive　properties,　encompassing　mechanical　properties　(where　the　shear　strength,　tensile　strength,　elongation　at　break,　and　hardness　can　respectively　reach　5.26　MPa,　9.92　MPa,　132.55　%,　and　47.77　Shore　D),　coating　properties　(where　the　absorption　rates　after　72　h　immersion　in　water,　ethanol,　10　wt%　HCl,　and　10　wt%　NaOH　solvents　are　respectively　0.66,　17.98,　1.89,　and　0.71　%,　and　the　volume　resistivity　and　breakdown　voltage　are　respectively　1.74x1016　Omega　&　sdot;cm　and　10　KV)　and　curing　properties　(where　the　curing　depth　can　reach　9.82　mm,　which　is　significantly　higher　than　3.51　mm　of　single　UV　curing,　and　the　colored　curing　is　complete).　It　can　exert　protective　functions　such　as　anti-corrosion,　anti-fouling,　and　insulation　on　circuit　boards,　electronic　packaging,　and　device　surfaces,　and　holds　great　potential　in　the　application　of　coating　materials.