Porcine rotavirus delta VP8* subunit recombinant protein and applications thereof

The invention relates to a porcine rotavirus delta VP8* subunit recombinant protein and an encoding gene of the protein. The invention further provides a recombinant protein formed after increasing tetanus toxin T cell epitope P2 into the recombinant protein, and an encoding gene. The delta VP8* protein is 64th-site to 223th-site amino acid in the VP8* and can effectively stimulate an organism to produce specific serum antibody, humoral immune response is good, the problem that the VP4 gene can not conduct prokaryotic expression due to overlarge fragment can be overcome, the protein can be expressed as a soluble protein in vitro, so that the problem that the VP8* is expressed as an inclusion body in vitro can also be overcome; the T cell epitope P2 (830th-site to 844th-site amino acid of TT) in the tetanus toxin is induced into the delta VP8* subunit recombinant protein, so that the immunity efficacy of the protein can be greatly improved, the faster and stronger neutralizing antibody titer can be induced, and high-titer rotavirus cross neutralizing antibody can also be induced.