The invention discloses a novel precision piezoelectric injection valve, belonging to the technical field of piezoelectric injection valves, comprising a socket, the socket and a control board installed in an end cover, the end cover, an adjusting screw, a flow channel assembly, and an amplifying lever , power components and fixed hinges are installed on the body. In the present invention, the nozzle is fixedly installed through the cooperation of the designed end cap, adjusting screw, flow channel assembly, amplifying lever, power assembly, fixed hinge, body and knob handle, and the position of the nozzle will not be loosened after a long time of work. , prolong the interval between regular nozzle calibration, reduce maintenance time, improve the stability of continuous work, the position of the flow channel can be adjusted, and the position of the valve body is more flexible in the face of complex working environments. , to facilitate maintenance, improve maintenance efficiency, effectively improve the accuracy of the value between the striker and the nozzle, and avoid a large pressure between the striker and the nozzle.