Puncture needle insertion depth measurement and control device

The utility model discloses a puncture needle insertion depth measuring and controlling device. The puncture needle insertion depth measuring and controlling device comprises a needle insertion limiting ruler, a needle insertion limiting vernier, a needle insertion depth measuring instrument, a needle insertion depth measuring instrument, a needle insertion depth measuring instrument and a needle insertion depth measuring instrument, wherein the needle insertion limiting ruler is provided with a sliding groove for accommodating the needle insertion limiting vernier; the needle inserting limiting ruler is of a groove body structure with a U-shaped cross section, and the sliding grooves are formed in at least one wing plate on the two sides of the U-shaped groove body structure. The needle inserting depth scale is arranged on the needle inserting limiting vernier and is provided with a measuring roller; two ends of the supporting connecting rod are respectively connected with the needle inserting depth scale an