Watertight coaxial connector

The utility model relates to a connecting device for underwater equipment, in particular to a watertight coaxial connector, which comprises a coaxial socket and a coaxial plug which can be plugged and unplugged with each other and are connected and screwed through threads, wherein the coaxial socket cures a male insertion pin, a shielding sleeve, a socket concentric member, a socket fixing member and the like to form an integrity in a manner of pouring epoxy resin as well as curing and forming; and the coaxial plug forms a plurality of components into an integrity by matching vulcanization process and the like in a manner of pouring epoxy resin as well as curing and forming. The plurality of components in the coaxial socket and the coaxial plug are coaxially distributed, thereby ensuring the plugging/unplugging safety and operational simplicity of the watertight coaxial connector; with the complete double sealing structural design, the watertightness below great depth is ensured; with the internal non-cavity design, the watertight coaxial connector is ensured to have high compressive strength; and the watertight coaxial connector has the advantages of simple and compact structure, low cost, small shape size, good underwater sealing performance, stable signal, high anti-interference capacity, long service life and the like.