The invention discloses an ultrasound-guided puncture and nerve block auxiliary positioning device, which includes an adjustment mechanism, a lifting support rod and a positioning mechanism. , resetting groove, headrest, supporting desktop, display screen and computer mainframe, one side of the supporting bed board is dug with a horizontal chute, and the inside of the horizontal chute is connected with a horizontal screw rod for rotation, and the horizontal chute of the horizontal chute The horizontal slider is slidingly connected inside, and the horizontal screw passes through the middle of the horizontal slider, and the horizontal screw is screwed to the horizontal slider. By setting up an infrared auxiliary device and positioning mechanism, combined with computer integration , making it easier for the puncture needle and the scanning section to be on the same plane, increasing the imaging effect, inputting information in advance when a certain position needs to be punctured, and the computer can give a reminder at the position closest to the puncture, improving the success rate of puncture and reducing complications and anesthesia dosage.