Chimeric DNA polymerase and application thereof

A chimeric DNA polymerase, comprising:

• a first peptide fragment comprising an amino acid sequence of sites 1 to 130 of a KOD DNA polymerase;
• a second peptide fragment comprising an amino acid sequence of sites 131 to 337 of a Pab DNA polymerase, an N-terminal end of the second peptide fragment being connected to a C-terminal end of the first peptide fragment;
• a third peptide fragment comprising an amino acid sequence of sites 338 to 373 of the KOD DNA polymerase, an N-terminal end of the third peptide fragment being connected to a C-terminal end of the second peptide fragment;
• a fourth peptide fragment comprising an amino acid sequence of sites 374 to 448 of a Pfu DNA polymerase, an N-terminal end of the fourth peptide fragment being connected to a C-terminal end of the third peptide fragment;
• a fifth peptide fragment comprising an amino acid sequence of sites 449 to 500 of the Pab DNA polymerase, an N-terminal end of the fifth peptide fragment being connected to a C-terminal end of the fourth peptide fragment;
• a sixth peptide fragment comprising an amino acid sequence of sites 501 to 591 of the Pfu DNA polymerase, an N-terminal end of the sixth peptide fragment being connected to a C-terminal end of the fifth peptide fragment;
• and
• a seventh peptide fragment comprising an amino acid sequence of sites 591 to 774 of the KOD DNA polymerase, an N-terminal end of the seventh peptide fragment being connected to a C-terminal end of the sixth peptide fragment.