The invention discloses an
endoscope puncture needle capable of quantitatively controlling negative pressure, and belongs to the technical field of
medical instruments. The
endoscope puncture needle comprises a needle cylinder, a main
piston is arranged in the needle cylinder in a sleeving mode, and the end surface of the main
piston is fixedly connected with one end of a first
threaded rod. According to the
endoscope puncture needle, under the mutual cooperation of the designed main
piston, an auxiliary piston, the first threaded cylinder, a first rotating shaft, a second rotating shaft, a first gear, a second gear, a pressure relief channel, a torsion wheel, a third threaded cylinder, a third
threaded rod and a second threaded cylinder, the quick adjustment and fine adjustment can be carried out, so that the quantitative pressure adjustment is more accurate, a gesture of pulling the main piston is not required to be kept all the time in the process of extracting focus tissue of a patient by utilizing negative pressure, the operation is more stable, the fine
adjustment action of the negative pressure value is performed according to the actual situation, so that the negative pressure required in the actual operation is obtained, the focus tissue is better extracted, and the focus tissue of the patient in the needle cylinder can be prevented from being moved out of the needle cylinder under the action of thrust.