Novel uninterrupted automatic syringe for livestock

The invention discloses a novel uninterrupted automatic syringe for livestock. A double-rack non-return injection structure is connected with a nozzle end through a parallel backflow anti-siphon structure, the double-rack non-return injection structure is connected with a circuit control and liquid leakage detector which controls the double-rack non-return injection structure to work, and uninterrupted automatic injection is achieved; the parallel anti-siphon backflow structure is composed of multiple check valves which are connected in series, and two syringe cylinders work alternately, and uninterrupted continuous injection is conducted; a gear rack transmission mechanism structure is composed of a pair of racks and a gear, and the two syringe cylinders work alternately in and out. Accordingly, automatic liquid medicine pushing can be achieved, the fatigue of the manual injection is relieved, the injection dose and the injection rate can be adjusted, uninterrupted injection is achieved, the injection effici