The utility model relates to an auxiliary medical tool specifically is a puncture measuring instrument. Including base, angulation chi ware, base and the base of angulation chi ware are connected for plasticity, and angulation chi ware uses its base can slope and change inclination as the axis on the base, have an inserting needle hole near on the base of the former position of angulation chi ware division, and the aperture in inserting needle hole is 0.01 - 20mm, and the pjncture needle passes the inserting needle hole, and angulation chi ware uses the pjncture needle as the axle, can with base whole horizontal rotation together. The utility model discloses can measure the needle angle and the degree of depth of pjncture needle accurately, realize universal accurate aspiration biopsy and therapeutic purposes, reduce the number of times of puncture adjustment, make the patient avoid unnecessary damage and painful, reduce scan times, make to receive exposure dose greatly reduced.