Acupuncture biopsy coaxial needle fixer

The utility model discloses a puncture biopsy coaxial needle fixator which comprises a circular hoop body, two foot stands and a diameter adjusting assembly. A needle holding hole with a notch is formed in the center of the circular hoop body, a diameter adjusting groove communicated with the notch is formed in the circular hoop body, two opposite extending parts are arranged on the two sides, corresponding to the diameter adjusting groove, of the circular hoop body, and the diameter adjusting assembly is installed on the two extending parts. The two groups of foot stools are movably mounted on the circular hoop body, the two groups of foot stools and the center point of the needle holding hole are triangularly distributed on a plane perpendicular to the central axis of the needle holding hole, and the two groups of foot stools are arranged in a manner of angle adjustability relative to the circular hoop body in the plane where the central axis of the corresponding needle holding hole is located; and a resist