Positioning device for puncture and auxiliary caliper

The invention belongs to the technical field of medical auxiliary instruments, and particularly relates to a puncture positioning device and an auxiliary caliper, the puncture positioning device is used for assisting puncture of a puncture needle, the puncture positioning device comprises a supporting mechanism, the supporting mechanism comprises a transverse plate, a semicircular strip is fixedly mounted at the top of the transverse plate, and a pushing mechanism is rotatably mounted on the transverse plate; the rotating circle center of the pushing mechanism coincides with the circle center of the semicircular strip, the pushing mechanism is in damping sliding connection with the semicircular strip, the puncture needle and the pushing mechanism are detachably connected together, the pushing mechanism is used for controlling the puncture angle and the puncture depth of the puncture needle, and an anti-shaking mechanism is fixedly installed at the bottom of the transverse plate. Light plane guiding is carried