The invention discloses a therapeutic recombinant
antibody, and an encoding
gene and application thereof. In an excellent embodiment, the therapeutic recombinant
antibody is mainly formed by fusion of CBD collagen specific-binding polypeptide and an Fab segment of
cetuximab, and contains a light-chain variable region formed by a
genetic code with a sequence shown by SEQ ID NO:1 and a heavy-chain variable region which is formed by a
genetic code with a sequence shown by SEQ ID NO:2. The therapeutic recombinant
antibody disclosed by the invention not only has the specific-binding capacity of collagen but also reserves the
EGFR binding capacity of the
cetuximab, and besides, the functions of killing
tumor cells and suppressing
tumor growth of the
cetuximab are also maintained; and in addition, the recombinant antibody has high targeting ability and good
tumor tissue infiltration capacity in bodies and can realize slow release in tumor tissues, the anti-tumor effects of the therapeutic recombinant antibody are far better than those of a total-length antibody namely the cetuximab, and the therapeutic recombinant antibody has wide application prospects in
tumor detection preparations, antitumor medicines and the like.