The invention discloses an injection syringe for animal husbandry veterinarians. The injection syringe includes a ring, a steel housing and a pressing block; a syringe body is installed in the steel housing, scales are engraved in the front surface of the syringe body, a piston is movably installed in the syringe body, a piston shaft is fixed to the middle of the upper surface of the piston, a piston handle is fixed to the end, away from the piston, of the piston shaft, a latex head penetrating through the bottom of the steel housing is installed at the bottom of the syringe body, fixing blocks are fixed to both sides of the top of the steel housing, and an annular threaded connection port is fixedly formed in the lower surface of the steel housing; a limiting ring fixed to the surface ofthe steel housing is installed on the top of the annular threaded connection port and is in threaded installation on the outer side of the annular threaded connection port, a supporting column is fixed to the lower surface of the ring, and the pressing block is flexibly connected to the bottom of the supporting column through a spring. The injection syringe has the advantages that the injection syringe is reinforced during injection, more convenience is provided for veterinarians to conduct injection on poultry, and the stability of the injection syringe during injection is maintained.