Porcine circovirus type 2 (PCV2) and type 3 (PCV3) pose severe threats to swine health worldwide. PCV2 field strains continuously mutate with the co-circulation of multiple genotypes, resulting in potential immune escape from existing vaccines. PCV3, an emerging pathogen, currently has no commercially available vaccines. Clinically, PCV2-PCV3 co-infection is prevalent, thus highlighting an urgent need for a bivalent vaccine. This study aimed to construct a broad-spectrum, high-efficiency bivalen