Novel trunk injection machine

The utility model discloses a novel trunk injection machine which comprises a needle advance and retreat device, a clamping device and a medicine injecting device. The needle advance and retreat device comprises a sleeve; a push rod is arranged in the sleeve, one end of the push rod is provided with a piston head, and a needle advance and retreat threaded rod is installed at the other end of the push rod; the other end of the needle advance and retreat threaded rod spirally penetrates through the end of the sleeve and is connected with a needle advance and retreat hand shank; an injection needle head is installed at the other end of the piston head; the medicine injecting device is communicated with the injection needle head through a medicine injecting pipe and the piston head; the clamping device comprises a front chuck and a rear chuck, and the front chuck is connected with the rear chuck through a flexible connection device. The novel trunk injection machine is simple in structure and convenient to use; t